Intersection points of two straight lines Student activity Play

Introducing a new variable into an equation Whiteboard exercise Play

Inverse operations Student activity Play

Inverse operations Whiteboard exercise Play

Inverse proportion Class activity Play

Inverse proportion Whiteboard presentation Play

Ionic equations Animation Play

Ionisation enthalpy and electron affinity Whiteboard exercise Play

Ionisation enthalpy and electron affinity Student activity Play

Iron extraction Whiteboard exercise Play

Iron extraction Student activity Play

Is the equation unique? Student activity Play

Is the equation unique? Whiteboard exercise Play

Is this system at equilibrium? Student activity Play

Is this system at equilibrium? Whiteboard exercise Play

Le Chatelier's principle for gas reactions Student activity Play

Le Chatelier's principle for gas reactions Whiteboard exercise Play

Lena's number Whiteboard exercise Play

Lens equation and magnification Student activity Play

Lens equation and magnification Animation Play

Lens equation and magnification Whiteboard exercise Play

Letter symbols in equations, formulas and functions Class activity Play

Letter symbols in equations, formulas and functions Whiteboard presentation Play

Letter symbols in formulas Whiteboard presentation Play

Letter symbols in formulas Class activity Play