Study apps

A periodic table that works as a calculator, with every step shown.

• 53 short lessons across a two-semester course
• Balancing, stoichiometry, Lewis structures and 3D shapes
• Search 14,659 compounds, even offline

Live diagrams, lab simulations and lessons that explain every answer.

• 100 lessons in three courses: cell, plant and animal
• 37 interactive diagrams and 17 lab simulations
• Punnett squares, chi-square and DNA to protein

A calculator that understands units, and a full college course to go with it.

• 117 lessons, algebra-based and calculus-based
• Units that multiply, cancel and convert for you
• 9 simulation labs with live graphs