How to find the system of equations Student activity Play

Hydrogen spectral series Illustration Play

Imperial units of length Animation Play

Imperial units of length Student activity Play

Inequalities Whiteboard presentation Play

Inequalities Class activity Play

Inequalities (1) Whiteboard presentation Play

Inequalities (1) Class activity Play

Integers on the number line Whiteboard exercise Play

Intercept form of a straight-line equation Student activity Play

Intercept form of a straight-line equation Animation Play

Interior and exterior angles Animation Play

Interpolation and extrapolation Student activity Play

Interpolation and extrapolation Whiteboard exercise Play

Intersection points (1) Class activity Play

Intersection points (1) Whiteboard presentation Play

Intersection points (2) Whiteboard presentation Play

Intersection points (2) Class activity Play

Intersection points of function graphs Student activity Play

Is it translation or rotation or reflection? Student activity Play

Is the equation unique? Student activity Play

Isosceles triangles and symmetry Student activity Play

Lena's way Animation Play

Line emission spectra Student activity Play

Line emission spectra Whiteboard exercise Play