Spreadsheets are still useful, but if you do a lot of work with numbers, you'll realize that they have limitations.

Jupyter is a way of creating interactive notebooks that blend text, graphics, and code. This is a unique form of programming.

Simultaneous equations are two linear equations that can be solved using bar models. By remembering that the same letter will always have the same value we can work out the missing values. To solve ...

An algebraic equation contains one or more letters in it. Each letter in the equation is called a variable. A variable can change in value. We guess at different values for each letter until our ...