First time? Start here.
Explore how computers think through visual, beginner-friendly activities with English instructions. No account needed; younger learners may need help reading.
Open Source · Free Forever
DURA
Engineering education, hardened by design.
From your first click to engineering leadership. 15 phases. 3,500+ hours. Standards-backed. Free forever.
749 Lessons15 Phases3,500+ HoursFree Forever
Where are you on your journey?
DURA meets you where you are — from first curiosity to engineering leadership.
I'm ready to learn to code
A starting assessment suggests lessons to try. You can choose a different starting point. New to using a computer? Try Discovery first.
I'm building my career
12 career tracks from Frontend to CTO. Each one maps skills to real job descriptions and industry standards.
I want to build something
Explore project guides from CLI tools to AI agents. Check each guide's prerequisites and execution evidence before starting.
I'm a teacher
Browse the curriculum, export resources, and track which standards each lesson covers.
I'm already learning
Pick up where you left off.
Fifteen phases. One path.
A complete arc from first keystroke to engineering leadership.
Phase 0
Digital Literacy
Computing literacy & first principles
Explore
- Hours
- 50
- Modules
- 4
- Lessons
- 16
Phase 1
Programming Fundamentals
Variables, control flow, functions, debugging
Explore
- Hours
- 260
- Modules
- 7
- Lessons
- 50
Phase 2
Web Development
HTML, CSS, React, TypeScript, deployment
Explore
- Hours
- 365
- Modules
- 7
- Lessons
- 60
Phase 3
CS Fundamentals
Data structures, algorithms, discrete math
Explore
- Hours
- 270
- Modules
- 6
- Lessons
- 45
Phase 4
Backend Engineering
APIs, databases, auth, queues, deployment
Explore
- Hours
- 325
- Modules
- 6
- Lessons
- 50
Phase 5
Systems Engineering
OS, networking, database internals, cloud
Explore
- Hours
- 395
- Modules
- 5
- Lessons
- 40
Phase 6
AI/ML Engineering
RAG, agents, MCP, fine-tuning, production AI
Explore
- Hours
- 550
- Modules
- 9
- Lessons
- 71
Phase 7
Advanced Systems
Compilers, distributed systems, Rust, perf
Explore
- Hours
- 360
- Modules
- 5
- Lessons
- 35
Phase 8
Professional Practice
Testing, CI/CD, architecture, security
Explore
- Hours
- 270
- Modules
- 7
- Lessons
- 44
Phase 9
CTO Track
Leadership, architecture at scale, org design
Explore
- Hours
- 600
- Modules
- 10
- Lessons
- 68
Phase 10
Embedded / Firmware
C and Rust on ARM Cortex-M, RTOS, drivers
Explore
- Hours
- 19
- Modules
- 10
- Lessons
- 10
Phase 11
Hardware Verification
SystemVerilog, UVM testbenches, IEEE 1800
Explore
- Hours
- 16
- Modules
- 10
- Lessons
- 10
Phase 12
Quant / HFT Systems
Microsecond-latency C++ for quant trading
Explore
- Hours
- 16
- Modules
- 9
- Lessons
- 12
Phase 13
Robotics
ISO 10218, collaborative robot safety, ROS 2
Explore
- Hours
- 13
- Modules
- 9
- Lessons
- 12
Phase 14
Manufacturing
ISO 9001, GD&T, Lean, Six Sigma, IIoT
Explore
- Hours
- 20
- Modules
- 14
- Lessons
- 16
Built for how learning actually works.
Six pillars. No shortcuts. No fluff.
Optional Mastery Gates
Practice module assessments, or enable strict gating to require a passing score before advancing.
FSRS Repetition
Review scheduling adapts to your ratings using the FSRS algorithm.
Code Sandboxes
Practice with browser code runners. Available languages and connection requirements vary by runner.
Engineering Dictionary
Explore technical definitions and their source references alongside your lessons.
Offline-First
Read downloaded lessons and use saved learning records offline. Downloads, account sync, AI, and online assessments need a connection.
Specialty Tracks
Explore Embedded, Hardware, Robotics, Quant/HFT, and Manufacturing, with links to external certifications. Provider exams are separate.
Mapped to industry standards
ACM CS2023
ACM/IEEE Computing Curricula 2023
SWEBOK v4
Software Engineering Body of Knowledge
SFIA 9
Skills Framework for the Information Age
Bloom's Taxonomy
Cognitive learning hierarchy