To start using a spreadsheet, log in to Purple Mash and launch 2Calculate in formula mode.
You can see that the app shows a grid of cells on the screen. You can select a cell by clicking with the pointer or by using the arrow keys to move around. You can enter letters and numbers into a the selected cell by typing or using the tool panel on the right.
At the end of your lesson, save your work in your own Purple Mash Work folder.