Skip to Content Go to sign in Skip to Primary Navigation Skip to Page Navigation Skip to Header Navigation Skip to Footer Navigation Read more about accessability options and our navigation

Physics Classroom is making strides to make our site accessible to everyone. Our site contains 6 navigation areas. The Primary, Secondary, and Page Level navigations have a screen reader version of their nav structure that allows using the left and right keys to navigate sibling navigation items, and up or down keys to navigate parent or child navigation items. The others can be navigated using tabs. The Primary Navigation handles the first 2 levels of site pages. The Secondary (which is not always available) handles the 3rd and 4th level of structure. The Page level navigation allows you to navigate the current page's headings quickly. The Header Navigation contains the Light/Dark Mode toggle, Search, Notifications and account login. The Breadcrumb Navigation contains the breadcrumb of the current page. If the current page has a breadcrumb, you can get to it by skipping to the content and tabbing in reverse (shift plus tab). The Footer Navigation contains links such as Privacy, Contact, about and terms. Some resources contain an Audio Player that can be activated by holding down the T key for 3 seconds, and then using K to pause and resume. While not every area of Physics Classroom is usable purely from keyboard and screen reader, we are committed to continue work on making this possible. If you have questions or need additional help, please use this link to contact us.

Return to screen reader navigation
Home Concept Builders

Concept Builders for Physics and Chemistry

Concept Builders are interactive questioning modules that target student understanding of discrete topics. We have more than 200 Concept Builders spread across 18 topic areas. This includes 74 Chemistry Concept Builders. Learn more About Concept Builders.

We introduced Version 2 Concept Builders in August of 2020. A Version 2 Concept Builder works with our Task Tracker program to track the progress of students on Concept Builder tasks and allows teachers to customize the task and its scoring. Learn more about Version 2 Concept Builders.

Task Tracker subscriptions for teachers and schools can now be purchased online. Directions for getting started can be found on our Directions page. Or visit the Store for more details about how to bundle Concept Builders with other Task Tracker features.

Concept Builder Categories

Categories are presented in typical course chronological order.

Physics Topics

Units and Measurements (4)
Relationships and Graphs (5)
Kinematics (13)
Newton's Laws (13)
Vectors and Projectiles (10)
Forces in 2D (4)
Momentum and Collisions (8)
Work and Energy (11)
Circular and Satellite Motion (5)
Rotation and Balance (8)
Fluids (7)
Static Electricity (10)
Electric Circuits (10)
Vibrations and Waves (14)
Sounds Waves (4)
Light Waves and Color (6)
Reflection and Mirrors (3)
Refraction and Lenses (3)

Chemistry Topics

Relationships and Graphs (5)
Chemistry Lab (3)
Measurements and Calculations (5)
Matter (6)
Elements, Atoms, and Ions (3)
Compounds, Names, and Formulas (3)
Modern Atomic Model (5)
Chemical Bonding and Molecular Shape (5)
Mole (2)
Chemical Reactions (4)
Stoichiometry (5)
Gases and Gas Laws (4)
Solids, Liquids, and Intermolecular Forces (2)
Thermodynamics (6)
Solutions (3)
Acids and Bases (3)
Kinetics and Equilibrium (6)
Thermodynamics (3)
Electrochemistry (5)
Nuclear Chemistry and Radiation (1)