Using graphs (1) Whiteboard presentation Play

Using graphs (1) Class activity Play

Using linear equations to solve practical problems Student activity Play

Using mean bond enthalpies in calculations. Part 2 Student activity Play

Using new variables to solve trigonometric equations Whiteboard exercise Play

Using systems of inequalities to solve quadratic equations with a parameter Student activity Play

Using the calculator to solve trigonometric equations Animation Play

Variables and numbers of equations Slideshow Play

Vector equations of lines in 2-D Whiteboard presentation Play

Vector equations of lines in 2-D Class activity Play

Vector equations of lines in 3-D Class activity Play

Vector equations of lines in 3-D Whiteboard presentation Play

What are chemical compounds? Student activity Play

What is the meaning of rate constant and reaction order? Animation Play

When can a chemical reaction happen? Animation Play

Why the temperature affects the reaction rate? Animation Play

Word equations for reactions Student activity Play

Word equations for reactions Whiteboard exercise Play

Writing chemical equations using symbols and formulae Whiteboard exercise Play

Writing chemical equations using symbols and formulae Student activity Play

Writing down chemical equations Animation Play