Substituting into the formulas Class activity Play

Subtraction of algebraic sums Student activity Play

Subtraction of algebraic sums Animation Play

Subtraction of algebraic sums – activity Whiteboard exercise Play

Taking out a single term from algebraic equations Whiteboard exercise Play

Taking out a single term from algebraic equations Student activity Play

Term-to-term and position-to-term definitions Animation Play

The assumptions and the claim Animation Play

The classical definition of probability Student activity Play

The content of a problem as an algebraic expression Student activity Play

The content of a problem as an algebraic expression Animation Play

The content of a sentence as an algebraic expression Student activity Play

The content of a sentence as an algebraic expression Animation Play

The content of a sentence as an algebraic expression Animation Play

The definition of a composite function Student activity Play

The definition of a geometric sequence Whiteboard exercise Play

The definition of a geometric sequence Student activity Play

The letters in algebraic expressions, formulas, equations and functions Whiteboard exercise Play

The letters in algebraic expressions, formulas, equations and functions Student activity Play

The simpler way to write algebraic expressions Whiteboard exercise Play

The sum of an infinite series – a definition Whiteboard exercise Play

The sum of an infinite series – a definition Student activity Play

The term-to-term definition of the sequence Whiteboard exercise Play

The value of an algebraic expression Student activity Play

The value of an algebraic expression Whiteboard exercise Play