Explanations and examples of composing functions with functions.

Explains how to construct a simple box-and-whisker plot, and demonstrates the steps. Discusses quartiles and medians, shows how to find them, and explains how they relate to box-and-whisker plots.

Explains the basic terminology and formatting of ratios, and demonstrates how to solve typical exercises.

Explains how to round to a given number of "significant digits".

Introduces techniques for solving trigonometric equations. Provides worked examples of solving some simpler to medium-hard equations.

Explains how to create a stem-and-leaf plot from a data set. Demonstrates how to format a clear stem-and-leaf plot.

Introduces the basic terminology of Venn diagrams, and shows how to "populate" and read Venn diagrams.