Screencasts: > 125 short screencasts organized by topic and by textbook

Quiz screencasts: > 20 screencasts with built-in quizzes

Interactive self-study modules: ~18 interactive self-study modules

Interactive simulations: 66 simulations: Distillation, absorption/stripping, extraction, membrane separation, phase equilibrium, diffusion

ConcepTests: more than 200 multiple-choice conceptual questions (instructors only)