Mathematics
Intermediate
50 mins
Teacher/Student led
+65 XP
What you need:
IWB/Projector/Large Screen

Bar Charts with a Scale of Two

Learn to read bar charts where the scale climbs in twos instead of ones, and discover how bars landing between marks show odd numbers.

Teacher Class Feed

Load previous activity

    1 - Getting Started ~4 mins

    Look at this chart. The tallest bar counts fourteen children, but our page only has room to count up to about eight. The bar runs right off the top!

    What could we change about the numbers up the side so the tall bars still fit on the page?

    2 - Watch and Notice ~8 mins

    Here is the same idea, but now each step up the side counts two: 0, 2, 4, 6, 8, 10, 12. Read the scale marks aloud first, then read where each bar lands.

    Watch out

    It does not stop on a mark. It stops halfway between two marks, so it counts the odd number in between.

    3 - Sketch the Scale of Two in Your Copy ~2 mins

    COPYBOOK MOMENT

    Illustration for Sketch the scale of two in your copyIn your maths copy, draw a scale up the side marked 0, 2, 4, 6, 8, 10, 12. Then sketch one bar reaching 6 and one bar that stops halfway between two marks to show 7.

    4 - Try It Together ~10 mins

    Key point

    Today we work through four bars together on a scale of two. Name which two marks each bar sits between before you read it. The in-between ones catch people out.

    • a bar at the 4 mark
    • a bar at the 10 mark
    • a bar halfway between 8 and 10
    • build a bar up from 0 to a count of 11

    Reading and building on a scale of two

    5 - Class Challenge ~8 mins

    Key point

    Your turn now. Same scale of two, but you predict and build each bar before we check it. Watch for the bars that stop halfway between two marks.

    Read the scale of two

    Pupil practice
    Module 9 · Data and Chance Mixed
    Lesson 100 · Bar Charts with a Scale of Two
    Download Activity Book page (PDF)
    123learn · Online learning platform

    Unlock the full learning experience

    You're previewing this lesson. Get full access to this lesson and hundreds more — each one ready to teach, with interactive activities, printable resources and pupil progress tracking built in.

    Hundreds of curriculum-aligned lessons
    Interactive activities in every lesson
    Printable resources & progress tracking
    Copyright Notice
    This lesson is copyright of Coding Ireland 2017 - 2025. Unauthorised use, copying or distribution is not allowed.
    🍪 Our website uses cookies to make your browsing experience better. By using our website you agree to our use of cookies. Learn more