A point of tangency Whiteboard exercise Play

A point, a radius and an angle Animation Play

A snail's trip Whiteboard exercise Play

A square in a coordinate system Whiteboard exercise Play

A symmetrical triangle on squared paper Student activity Play

A triangle in a coordinate system Whiteboard exercise Play

Aberration Animation Play

Accurately determining an unknown molarity of acid/base by titration Whiteboard exercise Play

Accurately determining an unknown molarity of acid/base by titration Student activity Play

Acid-base titration Class activity Play

Acid-base titration Whiteboard presentation Play

Aldehydes and ketones Whiteboard presentation Play

Aldehydes and ketones Class activity Play

Algebraic solutions Student activity Play

Alkanes and cycloalkanes Whiteboard presentation Play

Alkanes and cycloalkanes Class activity Play

Allotropes of carbon Animation Play

Amino acids Whiteboard presentation Play

Amino acids Class activity Play

Amorphous solids Student activity Play

An angle and points on the circle Student activity Play

An angle and points on the circle Whiteboard exercise Play

An enlargement Simulation Play

An image formed by a concave mirror Animation Play

An object brought closer to the focal point Animation Play