The structure of a lens Student activity Play

The structure of a spherical mirror Animation Play

The structure of a spherical mirror Animation Play

The tangent Class activity Play

The tangent Whiteboard presentation Play

The tangent and coordinates of the points Animation Play

The tangent as a coordinate Animation Play

The tangent from a point to a circle Whiteboard exercise Play

The tangent from a point to a circle Student activity Play

The tangent of an arbitrary angle Student activity Play

The transfer of energy Animation Play

The transformed point's image Whiteboard presentation Play

The transformed point's image Class activity Play

The trends in the properties of the elements in Period 3 Class activity Play

The trends in the properties of the elements in Period 3 Whiteboard presentation Play

The triangle under enlargement Animation Play

The triangles under enlargement Whiteboard exercise Play

The unusual properties of beryllium Student activity Play

The unusual properties of beryllium Animation Play

The value of square root of 5 up to three decimal points Whiteboard exercise Play

The weight in pounds and the weight in kilograms Whiteboard exercise Play

Titration of acid with base Animation Play

Titration of strong acids and strong bases Student activity Play

Titration of weak acids and bases Student activity Play

Titration technique Student activity Play