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Welcome to the Lab
Chemistry, physics, teaching strategies, and classroom technology, all in one place.
Jump to: Chemistry AP Chemistry Physics
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Science
Chemistry, AP Chemistry, and Physics: notes, lab activities, and practice.
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Teaching
Classroom-tested strategies, routines, and tech, from note-taking to brain breaks, ready to try in your own room.
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Lab Notes
Life outside the classroom: rides, food, projects, and a little science when it sneaks in.
Featured Resources
Chemistry · Interactive Reference
Interactive Periodic Table
All 118 elements in one place. Tap any element for its atomic mass, electron configuration, and common ions, or switch to heatmaps of atomic radius, electronegativity, and ionization energy.
Free, no login, works on any device.
Test Prep · ACT Science
ACT Science Practice
Original ACT-style passages with the same tools as test day: highlighter, line reader, answer eliminator, flags, and a timer. Finish a set to see your estimated ACT Science score, how it compares nationally, and tips for the skills you missed.
Free, no login, works on any device.
Featured Lessons
Chemistry · Ionic Bonding
Predicting Charge
Count valence electrons, pick the shorter path to 8, and predict the charge of any main-group ion. Includes hints and quick self-checks.
Chemistry · Ionic Bonding
Lewis Structures
Show how metals hand electrons to nonmetals, then turn the drawing into a formula. Comes with a practice worksheet.
AP Chemistry · Unit 3
3.4 Ideal Gas Law
One equation, four variables. PV = nRT, the classic gas laws, partial pressures, and five fully worked examples.
