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Learn telecom, get verified.
Free courses on VoIP, SMS, eSIM, and reselling — real simulations, real quizzes graded on our server (never in your browser), and progress that's actually saved to your account.
Featured
Featured
beginner
Chinese HSK 1: Zero to Hero
Absolute beginner Mandarin — pinyin and the four tones, greetings, numbers, family, and your first real sentences.
12 levels
Start now →
Featured
beginner
Public Speaking Foundations
The real basics — why the fear happens, how to control your breath and voice, a speech structure that always works, body language that reads as confident, and how to stop saying "um."
7 levels
Start now →
Featured
beginner
Job Interview Mastery: How to Get Hired
A practical, step-by-step guide to preparing for, surviving, and winning any job interview — research, storytelling, tough questions, body language, and what to do after.
8 levels
Start now →
Telecom Basics for Beginners: Zero to Hero
VoIP, eSIM, SMS, and DID reselling business setup, pricing, scams, and scaling — broad telecom industry knowledge with a fast, free path into reselling through 6X.
beginner
12 levels
25 min
Product Manager: Zero to Hero
What product managers actually do, day to day - discovery, roadmaps, working with engineers and designers, and shipping things people want.
beginner
8 levels
55 min
Privacy Engineering for Beginners: Zero to Hero
GDPR, CCPA and privacy-by-design, data minimization and anonymization, and privacy impact assessments - a fast-growing field sitting between engineering, legal, and security.
beginner
7 levels
50 min
DevOps Engineering
CI/CD, infrastructure as code, containers, and monitoring - the culture and tools behind shipping software reliably, zero to job-ready.
beginner
8 levels
55 min
Content Creation for Beginners: Zero to Hero
Find your niche, plan real content, grow an audience, and eventually get paid for it — the honest, non-hype path into content creation.
beginner
7 levels
50 min
Social Media Marketing
Choosing the right platforms, building real engagement, running ads, and proving ROI - social media marketing from zero to job-ready.
beginner
8 levels
50 min
Cyber Security: Zero to Hero
Common threats, passwords and authentication, network security basics, how a penetration test works, and how to start a career in security.
beginner
7 levels
50 min
Project Management
What a project manager actually does day to day - lifecycle, methodologies, budgets, stakeholders, and risk - zero to job-ready.
beginner
8 levels
55 min
Product & Digital Marketing for Beginners: Zero to Hero
From the marketing funnel to real campaigns - channels, content, analytics, and how to plan marketing that actually works.
beginner
8 levels
50 min
AI & Automation for Beginners: Zero to Hero
Cut through the hype and understand what AI and automation tools actually do - and how to start using them at work today.
beginner
8 levels
50 min
Data Science for Beginners: Zero to Hero
How raw data becomes real decisions - statistics, tools, and the full pipeline from collecting data to building your first model.
beginner
8 levels
55 min
Product Design UI & UX: Zero to Hero
The difference between UI and UX, real research and prototyping methods, design principles, accessibility, and the tools designers actually use every day.
beginner
8 levels
55 min
Graphics Design
Color, typography, layout, and the real tools and workflow behind professional graphic design - zero to portfolio-ready.
beginner
8 levels
55 min
Virtual Assistant for Beginners: Zero to Hero
Become a paid virtual assistant — the niches, the tools, finding clients, and avoiding scams, from someone who has never done remote work before.
beginner
8 levels
55 min
Python Programming for Beginners: Zero to Hero
Variables, control flow, functions, lists and dictionaries, and where Python is actually used - a real first programming language course, no prior coding experience assumed.
beginner
7 levels
55 min
Engineering Management for Beginners: Zero to Hero
The real transition from individual contributor to manager - one-on-ones, feedback, planning, hiring, and handling conflict, for engineers considering a management track.
beginner
7 levels
55 min
Software Development for Beginners: Zero to Hero
What building real software actually involves — beyond "learn to code" — the process, the mindset, and the career paths available.
beginner
7 levels
60 min
Front End Development: Zero to Hero
HTML, CSS, and JavaScript fundamentals, the DOM, responsive design, modern frameworks, browser dev tools, and how to ship your first real website.
beginner
8 levels
65 min
Data Analytics for Beginners: Zero to Hero
Turn raw numbers into real decisions — the analytics process, spreadsheets and stats basics, visualization, and how to tell a story with data.
beginner
7 levels
55 min
Backend Development for Beginners: Zero to Hero
What actually happens on the server when you tap a button - APIs, databases, authentication, and deploying real applications.
beginner
8 levels
55 min
VoIP Basics for Beginners: Zero to Hero
Voice over IP fundamentals, SIP routing, wholesale/retail margins, scam-spotting, and customer acquisition — a focused 7-level path to reselling VoIP minutes.
beginner
7 levels
15 min
SMS Basics for Beginners: Zero to Hero
SMS fundamentals, bulk messaging, OTPs, wholesale/retail margins, scam-spotting, and customer acquisition — a focused 7-level path to reselling SMS.
beginner
7 levels
15 min
eSIM Basics for Beginners: Zero to Hero
eSIM fundamentals, the reseller industry, wholesale/retail margins, and scam-spotting — general industry knowledge with real platform examples, since eSIM isn't a 6X self-serve product.
beginner
7 levels
15 min
A2P Messaging for Beginners: Zero to Hero
Application-to-Person messaging (OTP, alerts, marketing) at scale — compliance, pricing, and customer acquisition for the business-messaging niche of SMS reselling.
intermediate
7 levels
15 min
Billing Strategy for Telecom Beginners: Zero to Hero
Pricing models, payment gateways, fraud prevention, and revenue optimization — general billing strategy for running any telecom reselling business.
intermediate
7 levels
15 min
Number Porting for Beginners: Zero to Hero
How number porting actually works industry-wide, the real timeline and requirements, and how to spot porting scams — general knowledge, since porting-in isn't a self-serve 6X feature.
intermediate
7 levels
15 min
VoIP Call Origination for Beginners: Zero to Hero
Receiving and routing incoming calls at scale — real 6X Inbound Numbers and Basic IVR, pricing, compliance, and customer acquisition.
intermediate
7 levels
15 min
Rate Management for Telecom Beginners: Zero to Hero
How wholesale/retail rates actually work on 6X's platform — using the live Rates page, Route Test tool, and Sell Rates tool to price and protect your margin.
intermediate
7 levels
15 min
DID Basics for Beginners: Zero to Hero
Direct Inward Dialing numbers, real 6X Inbound Numbers assignment, pricing, and reselling — a real, self-serve 6X wholesale product.
beginner
7 levels
15 min
SIP Trunk Basics for Beginners: Zero to Hero
The protocol layer under wholesale voice reselling — SIP trunking, real current 6X voice rates, and reselling termination minutes.
intermediate
7 levels
15 min
PBX Basics for Beginners: Zero to Hero
Business phone systems — extensions, IVR menus, call queues — general industry knowledge, since a white-label PBX resale product isn't part of 6X's wholesale account.
beginner
7 levels
15 min
ORTP Routes for Beginners: Zero to Hero
What "premium quality" voice routing actually means (MOS, jitter, packet loss) — general industry knowledge for evaluating any provider's quality claims, including 6X's.
intermediate
7 levels
15 min
TDM Routes for Beginners: Zero to Hero
Legacy circuit-switched telecom (T1/E1/PRI) and how it bridges to modern VoIP — general industry knowledge, since 6X's own wholesale interconnect is SIP/IP-based.
intermediate
7 levels
15 min
NCLI Routes for Beginners: Zero to Hero
Why non-verified caller-ID routes are cheaper, when (rarely) that tradeoff is appropriate, and the real compliance risks — this is risk-evaluation knowledge, not a guide to bulk/robocall reselling.
intermediate
7 levels
15 min
CLI Routes for Beginners: Zero to Hero
Why verified caller ID matters — answer rates, trust, and compliance (STIR/SHAKEN) — general industry knowledge for evaluating any voice route, including 6X's.
intermediate
7 levels
15 min
OTP Routes for Beginners: Zero to Hero
Why OTP/2FA SMS delivery is treated differently from regular messaging — general industry knowledge for evaluating any SMS route's reliability, including 6X's.
intermediate
7 levels
15 min
SMS Marketing / Promo Routes for Beginners: Zero to Hero
High-volume promotional SMS done right — consent, DND compliance, and real economics — general knowledge for running compliant SMS marketing campaigns.
intermediate
7 levels
15 min
SBC (Session Border Controller) for Beginners: Zero to Hero
What protects a VoIP network at the edge — security, NAT traversal, topology hiding — general infrastructure knowledge, not a 6X product.
intermediate
7 levels
15 min
SS7 Security for Beginners: Zero to Hero
Why the global telecom signaling protocol has real, well-documented weaknesses, and how the industry defends against them — general security education, not a 6X product.
advanced
7 levels
15 min
IoT SIM for Beginners: Zero to Hero
SIMs built for machines, not people — general industry knowledge with real M2M platforms as examples, since IoT connectivity isn't a 6X product.
beginner
7 levels
15 min
Termination for Beginners: Zero to Hero
Sending calls out to be delivered on the real phone network — 6X's real wholesale voice product, pricing, compliance, and finding customers.
intermediate
7 levels
15 min
Voice Broadcast / Call Blasting for Beginners: Zero to Hero
Send pre-recorded or TTS voice messages to a whole list at once — 6X's real, self-serve Voice Broadcast tool in the business hub, with consent built in from the start.
intermediate
7 levels
15 min
Call Centers & Dialers for Beginners: Zero to Hero
Dialer types explained, plus 6X's real self-serve Power Dialer for working through a call list efficiently — general industry knowledge with one real 6X tool.
intermediate
7 levels
15 min
Unified Communications (UC) for Beginners: Zero to Hero
Voice + video + chat + presence in one platform — general industry knowledge with real platforms as examples, since UCaaS isn't a 6X product.
beginner
7 levels
15 min
Dedicated Ports for Beginners: Zero to Hero
Guaranteed concurrent-call capacity — general industry knowledge, plus the two real 6X concepts that come closest (your account's concurrent-call cap and 6X Switch's dedicated IP).
intermediate
7 levels
15 min
SIP Errors for Beginners: Zero to Hero
Decode SIP response codes and debug common call failures — general technical knowledge every VoIP reseller needs, plus 6X's real Route Test tool for diagnosing issues.
intermediate
7 levels
15 min
Class 4/5 Switch for Beginners: Zero to Hero
Understand tandem (Class 4) vs. local-exchange (Class 5) switching — and how 6X Switch is a real, self-serve Class 4 softswitch rental with your own vendor pool and dedicated IP.
advanced
7 levels
15 min
Telecom Regulations and Compliance for Beginners: Zero to Hero
A global, non-country-specific overview of telecom regulatory principles — licensing, anti-fraud, consumer protection — so you know what to research for your own jurisdiction.
intermediate
7 levels
15 min
Negotiation & Payment Terms for Telecom Beginners: Zero to Hero
Negotiate better rates and protect your cash flow — general business skills, grounded in the real fact that 6X itself runs strictly prepaid, no net-30 from 6X.
intermediate
7 levels
15 min
Telecom Network Security for Beginners: Zero to Hero
Understand the real threats (toll fraud, IRSF, CLI spoofing) and defenses — general industry knowledge grounded in 6X's real, live Fraud Watch monitoring system.
intermediate
7 levels
15 min
Telecom Channel Partner Management for Beginners: Zero to Hero
6X's real, self-serve Sales Partner program — how referral commissions actually work, and how the separate wholesale-reseller path fits alongside it.
intermediate
7 levels
15 min
Route Quality Test Tool Guide for Beginners: Zero to Hero
Test voice and SMS route quality before you commit real traffic — 6X's real Route Test tool plus the free Telecom Test Numbers list.
intermediate
8 levels
15 min
Telecom Cost Calculator Guide for Beginners: Zero to Hero
How to actually calculate telecom costs, margins, and sell prices — using 6X's real public rate deck and the Sell Rates doc, not a broken third-party tool.
intermediate
7 levels
15 min
Billing and Rating Systems in Telecommunications for Beginners: Zero to Hero
How telecom billing and rating actually work — general industry concepts, grounded in exactly how 6X itself rates and bills every call and SMS in real time.
intermediate
7 levels
15 min
Zero Capital to Start a Telecom Empire: Zero to Hero
Start a real VoIP/SMS reselling business with genuinely zero software cost — free wholesale registration, free testing tools, no switch software to buy or run.
beginner
7 levels
15 min
CC Routes for Beginners: Zero to Hero
Call Completion / Carrier-Grade / Clean routes — general industry knowledge about route-quality tiers, applicable to evaluating any voice route including 6X's own real termination product.
intermediate
7 levels
15 min
Carrier Interconnect for Beginners: Zero to Hero
How carriers exchange traffic — direct, indirect, and peering — and why becoming a regular 6X wholesale reseller already gives you real indirect interconnect, no carrier contracts needed.
intermediate
7 levels
15 min
Sales & Account Manager for Telecom Beginners: Zero to Hero
Find, close, and retain telecom customers — general sales and account-management skills applicable to reselling on 6X or referring through the real Sales Partner program.
intermediate
7 levels
15 min
Quantum-Safe Telecom for Beginners: Zero to Hero
Why quantum computing threatens today's telecom encryption, and what post-quantum cryptography is — general industry awareness, not a current 6X product.
advanced
7 levels
15 min
Carrier Relationship Manager for Beginners: Zero to Hero
The real skillset for sourcing and managing your own carrier relationships — most relevant if you run 6X Switch's own vendor pool, not needed for regular reselling.
advanced
7 levels
15 min
Dealing with Stress at Work in Telecommunications: A Practical Guide
Practical, field-tested techniques for staying calm and healthy through outages, escalations, on-call rotations, and 24/7 pressure.
beginner
7 levels
15 min
Getting Along with Colleagues in Telecom: Office & Remote Practical Guide
Practical strategies for building strong, low-conflict working relationships — in the NOC room and across distributed remote teams.
beginner
7 levels
15 min
Telecom Staff Skill Set to Success: A Practical Guide
The real skills that separate average telecom staff from the top performers who get raises, promotions, and long-term job security.
beginner
7 levels
15 min
Telecom Customer Support Skill Set: A Practical Guide
The real skills that drive high CSAT, first-contact resolution, and fast promotions for telecom support agents.
beginner
7 levels
15 min
Telecom Partnership Skills Set & Strategies: A Practical Guide
General partnership-building skills — trust, negotiation, enablement — for anyone managing telecom partnerships, including 6X's own real Sales Partner program.
intermediate
7 levels
15 min
Telecom Operations & Systems: Practical Training for Staff
Practical, hands-on operations knowledge for NOC, provisioning, billing support, fraud, interconnect, and QA staff — the systems, troubleshooting, and habits that make you effective.
intermediate
7 levels
15 min
Global Payment Netting Strategies in Telecommunications
Why carriers don't pay each other gross — offsetting mutual obligations to cut transfer fees, FX risk, and counterparty risk. General industry finance knowledge.
advanced
7 levels
15 min
Global Peering Strategies in Telecommunications
Transit vs. peering vs. IXPs — how networks connect globally, and how peering strategy cuts cost and latency. General IP networking industry knowledge.
advanced
7 levels
15 min
Telecom Wholesale Settlement Reconciliation
Why carrier settlement numbers rarely match perfectly, and how real reconciliation processes catch revenue leakage before it becomes permanent.
advanced
7 levels
15 min
Wholesale Interconnect Testing for Beginners
Validating a carrier interconnect before trusting it with real traffic — a focused look at bilateral testing methodology, using the real free Telecom Test Numbers tool.
intermediate
7 levels
15 min
Fraud Detection for Telecom Beginners: Zero to Hero
Understand the most common telecom frauds (IRSF, SIM boxing, CLI spoofing, Wangiri) and how detection actually works — grounded in 6X's real, live Fraud Watch system.
intermediate
7 levels
15 min
5G Core Operations & Monetization Strategies
Modern 5G Core architecture and the monetization models actually generating revenue today — Fixed Wireless Access, private 5G, and network APIs. General industry knowledge.
advanced
7 levels
15 min
SIP Troubleshooting & Packet Analysis: A Basic Practical Course
Quickly diagnose common SIP/VoIP problems using free tools — SIP basics, reading traces, and diagnostic checklists for the most frequent issues.
intermediate
7 levels
15 min
Resolving Disputes with Customers in Telecommunications
De-escalate, investigate fairly, and resolve billing/service disputes in a way that protects both the customer relationship and the company.
beginner
7 levels
15 min
Time Management Skills in Telecommunications
Practical time-management techniques for interrupt-heavy, 24/7 telecom roles — triage, focus blocks, on-call time management, and sustainable energy habits.
beginner
7 levels
15 min
Working Under Pressure in Telecommunications
Stay sharp and effective during real high-pressure moments — outages, fraud in progress, and VIP escalations. Physiological resets, decision-making frameworks, and recovery habits.
beginner
7 levels
15 min
Touch Typing for Beginners: Zero to Hero
Learn real touch-typing technique — hand placement, home row, muscle memory, speed and accuracy — then put it into practice in 6X Typing Quest.
beginner
5 levels
20 min
Chinese HSK 1: Zero to Hero
Absolute beginner Mandarin — pinyin and the four tones, greetings, numbers, family, and your first real sentences.
beginner
12 levels
25 min
Chinese HSK 2: Zero to Hero
Start building real conversations — completed actions with 了, modal verbs, comparisons, directions, feelings, and making plans.
beginner
11 levels
25 min
Locked
Chinese HSK 3: Zero to Hero
The final elementary-level course — experience with 过, resultative and directional complements, conditionals, and handling everyday real-world situations.
intermediate
11 levels
25 min
Locked
Chinese HSK 4: Zero to Hero
Intermediate Chinese begins — the 把 construction, passive voice, advanced connectors, abstract topics, and structuring your own opinions.
intermediate
11 levels
25 min
Locked
Chinese HSK 5: Zero to Hero
Advanced Chinese — register and tone, four-character idioms, news vocabulary, debate structures, and the 是...的 emphasis pattern.
advanced
11 levels
25 min
Locked
Chinese HSK 6: Zero to Hero
The top of the classic HSK scale — literary and academic Chinese, extended chengyu, formal essay writing, and exam strategy for the HSK6 summary-writing task.
advanced
11 levels
25 min
Locked
Bible Ministry Phrasebook: Preaching Skills
Real, ready-to-use Mandarin phrases for the door-to-door and informal ministry — greetings, presenting a topic, asking questions, using the Bible, and full sample conversations.
intermediate
11 levels
40 min
Chinese for Telecom: Buying, Selling & Route Negotiation
Real conversational Mandarin for the wholesale telecom trade — buying and selling voice/SMS routes, negotiating rates, discussing quality (ASR/ACD), and payment terms.
intermediate
8 levels
30 min
Bible Ministry Phrasebook: Teaching Skills
Vocabulary and phrases for conducting Bible studies and meetings — reading and teaching terms, meeting parts, the 66 Bible books, and how to introduce, discuss, and use scriptures and literature.
intermediate
12 levels
45 min
Bible Ministry Phrasebook: What the Bible Teaches
Core Bible-teaching vocabulary in Mandarin — God, the divine name, Jesus Christ, God's Kingdom, creation, spirit creatures, the Flood, and the last days.
intermediate
10 levels
45 min
Chinese Business Etiquette
The customs, hierarchy, and unspoken rules of doing business with Chinese-speaking partners — greetings, business cards, gift-giving, dining, and how "face" shapes negotiation — plus the vocabulary to navigate it.
intermediate
8 levels
40 min
Public Speaking Foundations
The real basics — why the fear happens, how to control your breath and voice, a speech structure that always works, body language that reads as confident, and how to stop saying "um."
beginner
7 levels
35 min
Public Speaking: Structure & Persuasion
Know your audience, use the three classic pillars of persuasion, structure a story that lands, and use evidence and rhetorical devices without sounding like a sales pitch.
intermediate
7 levels
35 min
Chinese Conversational Fluency I
The connector words, natural fillers, and repair phrases ("what does that mean?", "can you say that slower?") that make real conversation flow — not more vocabulary, but the glue between it.
intermediate
7 levels
35 min
Chinese Conversational Fluency II
Disagreeing politely, structuring a real argument, using idiomatic expressions naturally, and organizing longer spoken thoughts — the tools that separate "understandable" from "fluent."
advanced
7 levels
35 min
Office Protocol: Workplace Etiquette & Professionalism
The everyday, internal rules of a professional workplace — punctuality, communication with colleagues and managers, meeting habits, and handling conflict without drama.
beginner
8 levels
15 min
Job Interview Mastery: How to Get Hired
A practical, step-by-step guide to preparing for, surviving, and winning any job interview — research, storytelling, tough questions, body language, and what to do after.
beginner
8 levels
15 min
SQL & Databases for Beginners: Zero to Hero
Tables, SELECT, JOINs, and how to safely change data - the skill behind nearly every backend, analyst, and admin job.
beginner
8 levels
45 min
AWS Cloud for Beginners: Zero to Hero
EC2, S3, IAM, and how the most in-demand cloud platform actually works - from zero to your first real deployment.
beginner
7 levels
45 min
Excel for Beginners: Zero to Hero
Formulas, lookups, and PivotTables - the single most widely-required practical skill across every industry.
beginner
7 levels
40 min
Go (Golang) for Beginners: Zero to Hero
Variables to goroutines - why Go became the language behind Docker, Kubernetes, and much of modern cloud infrastructure.
beginner
7 levels
45 min
Software QA & Testing for Beginners: Zero to Hero
Test cases, bug reports, and automation basics - how QA engineers catch what developers miss, before customers do.
beginner
7 levels
40 min
IT & System Administration for Beginners: Zero to Hero
Users, servers, backups, and networking basics - the unglamorous, essential work that keeps every company's systems running.
beginner
7 levels
45 min
HR & Recruiting for Beginners: Zero to Hero
Writing job descriptions that work, screening well, and making offers that get accepted - the real skills behind hiring.
beginner
7 levels
40 min
Telecom REST APIs for Developers: Zero to Hero
A hands-on path through 6X's real developer APIs - authentication, Number Lookup, Fraud Check, SMS, Verify/OTP, and Webhooks - with real request/response shapes throughout.
intermediate
9 levels
20 min
Remote Work Success: Finding and Thriving in Remote Jobs
Where to actually find legitimate remote jobs, how to avoid remote job scams, and the real habits that make you stand out and get hired again once you're in.
beginner
7 levels
18 min
Job Interview Skills & Personal Branding
A practical, structured approach to interview prep - the STAR method, common questions, video-interview setup, and building a personal brand that gets you found.
beginner
6 levels
16 min
Customer Service Representative Fundamentals
The real, practical skills of a great customer service rep - active listening, de-escalating angry customers, writing warm support replies, and the metrics that actually matter.
beginner
7 levels
17 min
IT Support & Help Desk for Beginners: Zero to Hero
Real help desk fundamentals - ticket triage, remote troubleshooting, communicating with non-technical users, and the escalation tiers every support desk actually uses.
beginner
7 levels
18 min
Building Self-Confidence: Zero to Hero
What real confidence actually is, how body language and self-talk shape it, and practical habits - small wins, reframing criticism - that build genuine confidence over time.
beginner
6 levels
15 min
Emotional Intelligence at Work
Self-awareness, managing your own reactions, reading other people accurately, and using empathy to de-escalate conflict and give better feedback.
beginner
7 levels
16 min
Business Writing & Professional Communication
Real, practical writing skills for email, chat, and workplace messages - clarity, structure, tone, and writing the hard message well.
beginner
7 levels
15 min
6X Route Inspector: Independent Route Auditing
Test a voice or SMS route from your own switch, independently of your 6X wholesale account — FAS detection, CLI verification, and a shareable route score.
intermediate
7 levels
14 min
The Open University (OpenLearn)
Human Resources: Recruitment and Selection
External
beginner Free
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W3Schools
SQL Tutorial
External
beginner Free
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freeCodeCamp
Relational Databases Certification
External
beginner Free
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AWS Training and Certification
AWS Cloud Practitioner Essentials
External
beginner Free
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Microsoft Support
Excel for Windows Training
External
beginner Free
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Go.dev (Official)
A Tour of Go
External
beginner Free
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Applitools
Test Automation University
External
beginner Free
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freeCodeCamp
Free Linux Crash Course with Labs
External
beginner Free
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Duolingo
Duolingo Chinese Course
Free, bite-sized daily Chinese lessons with speaking and listening practice — a good everyday companion alongside the HSK courses here.
External
beginner Free
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Harvard (edX)
CS50: Introduction to Computer Science
Harvard's introduction to computer science and programming - algorithms, data structures, and problem solving.
External
Beginner Free
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University of Helsinki
Full Stack Open
Modern web development with React, Node.js, GraphQL, and TypeScript.
External
Intermediate Free
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freeCodeCamp
Scientific Computing with Python
Python fundamentals through scientific computing projects, with a verified certificate on completion.
External
Beginner Free
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freeCodeCamp
JavaScript Algorithms and Data Structures
Core JavaScript, ES6, algorithm scripting, and data structures, with a verified certificate.
External
Beginner Free
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Harvard (edX)
CS50's Introduction to Artificial Intelligence with Python
Search, knowledge, uncertainty, optimization, learning, and neural networks in AI, using Python.
External
Intermediate Free
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Google Cloud Skills Boost
Google Cloud Digital Leader Training
Foundational cloud concepts and Google Cloud products, self-paced.
External
Beginner Free
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Cognitive Class (IBM)
IBM Data Science Fundamentals
Zero-cost tracks for cloud architecture, data science, and AI fundamentals from IBM.
External
Beginner Free
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The Odin Project
The Odin Project - Full Stack JavaScript
Project-based full-stack JavaScript curriculum, open source and community-supported.
External
Beginner Free
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Harvard (edX)
CS50's Introduction to Cybersecurity
How to protect yourself and your organization from cyber threats, from Harvard.
External
Beginner Free
Visit course
University of Michigan (Coursera)
Django for Everybody
Building web applications with the Django framework - models, views, templates, and REST APIs.
External
Intermediate Free to audit
Visit course
freeCodeCamp
Data Analysis with Python
NumPy, Pandas, Matplotlib, and real data analysis projects, with a verified certificate.
External
Intermediate Free
Visit course
Chinese Testing International (Hanban)
Official HSK Exam Info & Registration
The official HSK exam site — registration, syllabus, and past papers straight from the test's own organizers.
External
Free info
Visit course
italki
italki — 1:1 Chinese Tutors
Live 1:1 conversation practice with native Mandarin tutors — the fastest way to turn HSK grammar into real speaking confidence.
External
Paid (per lesson)
Visit course
CompTIA
CompTIA Network+ Certification
An industry-recognized networking certification — solid foundation knowledge for anyone working in telecom or ISP operations.
External
intermediate Paid exam
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Cisco
Cisco Networking Academy
Free, self-paced networking courses from Cisco — covers the fundamentals behind the infrastructure telecom businesses run on.
External
beginner Free
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Coursera (Google)
Google IT Support Professional Certificate
A beginner-friendly IT support certificate covering networking, troubleshooting, and customer service — useful groundwork for telecom support roles.
External
beginner Free trial
Visit course
freeCodeCamp
freeCodeCamp
A fully free, project-based curriculum covering web development, JavaScript, Python, and data analysis — thousands of hours of real self-paced coursework, no paywall.
External
beginner Free
Visit course
Harvard (via edX)
CS50: Introduction to Computer Science
Harvard's legendary intro CS course — algorithms, data structures, and real programming in C, Python, and SQL. Free to audit; useful foundation for anyone building or automating telecom tooling.
External
beginner Free (audit)
Visit course
Google for Developers
Google's Python Class
Google's own free Python crash course, built for people who already know some programming — lecture videos plus real exercises, no signup required.
External
beginner Free
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