During this webinar Tim referred to two programs he created, one in Scratch, the other in Python; both based around giving change from an amount of money.
He also provided a version using each programing language showing how a loop could be incorporated for a more efficient program.
Note: Click to download the file and save to a relevant folder on your computer. Open the file once you have the Scratch or Python program open. For Chrome - to save the file, hold your mouse over the downloaded file, right click and select 'Show in folder'. Then select the file to Save.