Math & Science

Sites in this branch

• Brilliant paid
  Paid, but unusually good at making mathematical and scientific intuition feel interactive instead of ornamental. Visit site
• CK-12 Foundation free
  A broad school-learning resource that works best when you need examples, practice, and an explanation fast. Visit site
• Desmos freenoaccountnew
  A graphing calculator that turns abstract math into immediate visual feedback with almost no setup. Visit site
• Khan Academy free
  Still the cleanest open path from confusion to competence in school-level math, science, and economics. Visit site
• OpenStax free
  Open textbooks that are actually usable, complete, and good enough to displace expensive default options. Visit site
• Paul's Online Math Notes freenoaccount
  A plain old web resource that keeps saving students because the explanations are clear and the examples are abundant. Visit site
• Wolfram|Alpha freemium
  A computational answer engine that remains unmatched when the question is structured enough to compute. Visit site