Complete education built on evidence-based pedagogy. Nine academic levels. 32 subject domains. 55 programs. Free forever.
From elementary reading to doctoral research. Each level uses the pedagogy that works best for that stage of development.
Each academic level is paired with the instructional method that research shows produces the best outcomes for that stage.
15 to 26 minutes per concept. Grounded in cognitive science.
STEM, social sciences, humanities, professional, and applied fields.
Every interaction routes through the cognitive cascade. Offline levels cost microjoules. AI levels cost joules. You see the energy before you spend it.
L0-L3 work offline. L4+ require network. Most learning stays below L5.
Every course scores on a 100-point rubric across six dimensions. Courses below 90 go back to revision.
Clear learning objectives. Accurate content. Logical progression through material.
Active learning techniques. Varied content types. Meaningful interactivity.
Aligned to objectives. Multiple assessment types. Formative and summative balance.
Professional media. Clear audio and video. Consistent visual design.
Dyslexia fonts. Screen reader support. Closed captions. Color-blind modes.
Clear instructions. Help resources. Responsive feedback loops.
Lectures, simulations, case studies, coding labs, field work, oral exams, portfolio reviews, and more.
Lecture, Tutorial, Video, Simulation, Discussion, Case Study, Worked Example, Reference
Coding, Experiment, Project, Analysis, Design, Writing, Presentation, Fieldwork
Quiz, Exam, Midterm, Final, Project, Lab Report, Paper, Oral, Portfolio, Peer Review, Self-Assessment
No subscriptions, no tuition, no per-seat fees. Every lesson shows its energy cost in joules.