Today we are learning about how many hours, minutes or both something such as a film, baking a cake or bike ride takes. This is called the duration (or sometimes you might hear the words elapsed time). We need to look carefully at start and end times to help us work out how lone something takes. Watch the link and then go through the slides before selecting which chilli challenge to have a go at. Remember you can always start with chilli 1 if you are not to sure and move onto chilli 2 or 3 if you've got the hang of it.