Help your students master cumulative frequency graphs with this complete, IB-aligned mini-unit. Students learn how to build cumulative frequency tables, draw smooth ogive graphs, and use them to estimate the median, IQR, percentiles, and other key measures of spread. Why it’s easy for teachers A ready-to-teach PowerPoint lesson that introduces cumulative frequency tables and graphs step by step, with clear examples and visual scaffolds. Guided notes in fill-in format so students stay eng