A cleanly designed Excel Spreadsheet aimed at students learning the basics. Automatically checks answers by changing the colours of their answers if they are correct, to give you a self marking worksheet to quickly see the progress made by your pupils. Increases in difficulty, naturally differentiating the task. Cells students don't need to edit are protected, to ensure a smoother lesson. As the teacher, unlock the worksheet with the password "computingrocks" to fully edit the sheet if needed. Includes an example of a real world application in Part 2.