Description

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 engaged and record essential definitions, formulas, and examples without you needing to create them from scratch.

• Homework set with IB-style questions covering graph construction, interpolation, percentiles, and interpretation, plus a fully worked answer key for fast grading.

• A “Read Me” companion for setup, teaching tips, and even a bonus Google Forms quiz link for quick formative assessment.

Why it helps students

• Builds confidence with exam-style questions, giving practice in the exact skills tested on IB Math AI SL Paper 1 & 2.

• Reinforces proper IB habits: using a ruler for interpolation, showing markings for method credit, and writing out reasoning before calculator use.

• Strengthens IA skills by emphasizing how cumulative frequency graphs and statistical analysis connect to real-world data interpretation.

What’s covered

• How to create and interpret cumulative frequency tables.

• Constructing and reading ogive graphs.

• Estimating the median, IQR, and percentiles from a graph.

• Using cumulative frequency to compare groups and answer contextual IB-style questions.

What’s included

• Editable Lesson (PPTX) with objectives, definitions, worked examples, and practice prompts.

• Guided Notes (PDF) for students, including structured examples, fill-in tables, and graphing tasks.

• Homework (PDF) with scaffolded practice and IB-style questions.

• Answer Key (PDF) with complete solutions for every question.

• Teacher “Read Me” file with usage tips and bonus Google Forms quiz.

Aligned with IB Math Applications & Interpretation SL – Topic 4.2 (Presentation of Data), Section 4.2.3 Cumulative Frequency. Perfect for both classroom lessons and independent student review.