Browse our collection of free, open-source educational texts and documentation.
Comprehensive introduction to single-variable calculus covering limits, continuity, derivatives, and applications.
Learn Python from scratch with hands-on exercises, projects, and real-world applications for beginners.
First-year physics covering Newtonian mechanics, energy conservation, and thermodynamic principles.
DNA replication, gene expression, protein synthesis, and modern molecular biology techniques.
Survey of ancient civilizations from Mesopotamia through Rome, covering culture, governance, and technology.
Atomic structure, chemical bonding, reactions, stoichiometry, and thermochemistry for first-year students.