Perimeter of a square Student activity Play

Perimeter of a square Animation Play

Perimeters of geometric figures Student activity Play

Possible positions of two circles Animation Play

Properties of enlargements, part II Student activity Play

Property of a perpendicular bisector Animation Play

Pythagorean theorem in 3-dimensional space Whiteboard exercise Play

Pythagorean theorem in 3-dimensional space Student activity Play

Pythagorean triples Student activity Play

Radii of three circles Whiteboard exercise Play

Radioactive decay Student activity Play

Ratio of two quantities of the same kind Student activity Play

Ratios of sides in a triangle Animation Play

Real and apparent positions Simulation Play

Real gases Whiteboard exercise Play

Real gases Animation Play

Real gases Student activity Play

Real gases Animation Play

Reflecting telescopes Animation Play

Reflecting telescopes Student activity Play

Reflecting telescopes Whiteboard exercise Play

Reflection of light Class activity Play

Reflection of light Whiteboard presentation Play

Relationship between the electromagnetic force and the length of a conductor Student activity Play

Relationship between the electromagnetic force and the length of a conductor Whiteboard exercise Play