ReadTheory delivers completely free, adaptive reading comprehension exercises that calibrate passage complexity in real time based on each learner's responses. Covering K–12, ESL and adult literacy, the platform offers an AI Worksheet Builder, printable quizzes, district-level dashboards and SSO integration, while award-winning algorithms boost Lexile levels without teacher prep time. Detailed analytics flag skill gaps, project growth trajectories and satisfy state reporting requirements, making differentiated literacy instruction scalable at zero cost.

Access millions of student-shared study notes, AI summaries and flashcards from 60+ countries
◐FreemiumAI flashcards with spaced repetition & active recall gamified quizzes to lock everything you learn into memory
✓FreeKhan-style animated math videos plus step-by-step calculator for algebra, calculus, chemistry & physics homework