Dividing a sum by a monomial Animation Play

Divisibility Student activity Play

Does the triangle exist? Whiteboard exercise Play

Domain and periodicity of trigonometric functions Whiteboard exercise Play

Domain and periodicity of trigonometric functions Student activity Play

Double-angle formulas Whiteboard presentation Play

Double-angle formulas Class activity Play

Drawing a central angle Simulation Play

Drawing a scalar multiple Animation Play

Drawing an angle Whiteboard exercise Play

Drawing an inscribed angle Simulation Play

Drawing angles Student activity Play

Drawing angles Student activity Play

Drawing reflection diagrams Student activity Play

Early concepts of the structure of benzene Student activity Play

Effective rate Whiteboard exercise Play

Effective rate Student activity Play

Energy losses Student activity Play

Energy losses Simulation Play

Equal angles imply parallel lines Student activity Play

Equal segments Animation Play

Equations involving the cosine function Whiteboard exercise Play

Equations involving the cosine function Student activity Play

Equations involving the tangent function Student activity Play

Equations involving the tangent function Whiteboard exercise Play