Radio waves Student activity Play

Reasoning with angles Student activity Play

Reflection of light Student activity Play

Replacement resistance – connection in parallel Student activity Play

Replacement resistance – connection in series Student activity Play

Resistors – a case study Student activity Play

Ruler-and-compass constructions Class activity Play

Ruler-and-compass constructions Whiteboard presentation Play

Ruler-and-compass constructions, locus (1) Class activity Play

Ruler-and-compass constructions, locus (1) Whiteboard presentation Play

Scalar multiple Class activity Play

Scalar multiple Whiteboard presentation Play

Series and parallel circuits Whiteboard presentation Play

Series and parallel circuits Class activity Play

Short circuits Student activity Play

Sides of the triangles Animation Play

Spectral analysis Student activity Play

Spectroscope Animation Play

Statements about the given parallel circuit Whiteboard exercise Play

Supplementary, corresponding and alternate angles Whiteboard exercise Play

Supplementary, vertical, corresponding and alternate angles Student activity Play

Supplementary, vertical, corresponding and alternate angles Whiteboard exercise Play

Switches in parallel circuits Simulation Play

Symmetries with respect to parallel lines Student activity Play

Symmetries with respect to parallel lines Whiteboard exercise Play