This is a complete lesson providing an introduction to function notation and includes a mastery worksheet within the powerpoint.
The lesson includes a starter activity based on finding missing values in function machines.
A clear explanation on what a function is and how to substitute and solve a variety of equations using function notation.
2 full examples on substituting values into functions and 1 full example on how to calculate the input value given the output value (solving equations) .
A few questions for the students to try altogether before the worksheet.
A mastery worksheet split into 3 sections (fluency, reasoning and problem solving) so students can master the topic. It also includes a challenge question at the end involving finding roots of a cubic function.
Answers for the worksheet.
Plenary question getting students to think carefully about the input values given the output value.
If you would like to change the year in the PowerPoint (I have taught this topic to year 10 in the UK) all you need to do is to view slide master and change the master slide.