Averages and Range | Year 7 Maths PowerPoint Lesson

Make statistics click with this visual, colourful, ready-to-teach PowerPoint lesson for Year 7 Maths. Pupils learn the mean, median, mode and range, then discover why no single average suits every situation. Clear worked examples show every step, including finding the median from an ordered list and averages from a frequency table. An outlier slide shows how one extreme value drags the mean but barely moves the median, with a real salary example. A misconceptions slide tackles the errors that cost marks, such as forgetting to order the data. Two interactive, hands-on activities include a class data investigation and a decision task about which average to quote, plus explain-why reasoning questions with answers in the speech bubbles. Speech-bubble prompts nudge rather than gush. It is non-specialist friendly, works well as a cover lesson and builds towards GCSE quartiles, box plots and cumulative frequency. Everything is editable in PowerPoint so you can adapt it to your class. 17 slides, about one hour, aligned to the KS3 National Curriculum.