Math Interactives — Activity Hub

Geometry & Angles

Transversal & Angle Relationships

Explore vertical, corresponding, alternate interior, alternate exterior, and co-interior angles. Cycling highlight shows each pair on a parallel lines diagram.

Grade 8 · 8.G · Angles

Triangle Angle Sum Theorem

Drag vertices to explore any triangle. Cut the three angles out and watch them fold onto a straight line to prove they always sum to 180°.

Grade 7–8 · Geometry · Proof

Volume Calculator

Interactive 3D canvas showing sphere, cylinder, and cone. Adjust radius and height with sliders and watch the volume update instantly with the formula displayed.

Grade 7–8 · Volume · 3D Shapes

Fractions, Percents & Decimals

Mixed Numbers Explorer

Visual fractions and division tool. Build fractions visually, convert between mixed numbers and improper fractions, and explore division with fraction models.

Grade 6–7 · Fractions · Visual

Equivalence Explorer

See percents, fractions, and decimals all at once. Adjust one form and all three update simultaneously — builds deep understanding of equivalence.

Grade 6–7 · Equivalence · Conversion

Percent Explorer

Double number lines, tape diagrams, and a built-in quiz for percent calculations. Covers percent of a quantity, percent increase and decrease.

Grade 6–7 · Percents · 7.RP

Ratios & Real-World Contexts

Meat Lovers Pizza — Keep the Ratio

Maintain the correct topping ratios while scaling a pizza recipe using interactive sliders. Builds proportional reasoning in a delicious real-world context.

Grade 7 · 7.RP · Ratios

Meat Lovers Pizza — Advanced

Extended pizza ratio activity with fraction calculations and worksheet questions. Students work with unit fractions and rational number arithmetic.

Grade 7 · 7.RP · Fractions

Mac & Cheese — Noodle : Cheese : Pan

Maintain the 4:1:5 ratio using interactive sliders. Simple, reliable, and fun — drag one ingredient and watch the others scale proportionally.

Grade 7 · 7.RP · Proportions

Equations & Scientific Notation

Translating Words into Equations

Interactive applet bridging word problems and algebra. Match verbal descriptions to their algebraic form — the critical first step before solving.

Grade 7–8 · Algebra · Word Problems

Solving Linear Equations

Step-by-step visual equation solver with a work report and export feature. Covers one and two-step equations using the balance model and inverse operations.

Grade 7–8 · 7.EE / 8.EE · Equations

Graphing Simultaneous Equations

Enter two equations in ax + by = c form and plot both lines on a shared graph. The intersection point — the solution — is marked automatically.

Grade 8 · 8.EE.C.8 · Systems

Multiplying in Scientific Notation

Drag-and-drop activity matching each multiplication step to its correct description. Superscripts displayed clearly — builds procedural fluency with scientific notation.

Grade 8 · 8.EE.A.3–4 · Sci. Notation

Scientific Notation — Drag & Drop Exercise

Match each step in a scientific notation calculation to its correct description. Check your answers instantly and reveal the correct solution.

Grade 8 · 8.EE · Scientific Notation