Mathematics
Intermediate
50 mins
Teacher/Student led
+80 XP
Teacher-led from the board. Pupils do not need a device, but can follow on one.
What you need:
IWB/Projector/Large Screen

Finding a Half, a Third and a Quarter of a Quantity

Learn to find a half, a third and a quarter of a quantity by sharing amounts into equal groups. Use counters and drawings to understand how the bottom number of a fraction tells you how many groups to make.

Teacher Class Feed

Load previous activity
    Your turn
    Your teacher is running this lesson on the board. Here is the part you can try yourself.
    Equal groups

    1 - Getting Started ~4 mins

    Here are 12 counters on the board. If four children in a family share them out completely fairly, so nobody gets more than anybody else, how many counters will each child end up with?

    Have a think before any hands go up.

    2 - Watch and Notice ~11 mins

    The interactive shares out counters to find a fraction of a number. Each time, watch two things: how many equal groups we make, and how many counters land in one group.

    3 - Try It Together ~7 mins

    Worked example

    Today we work through these fractions of quantities together on the board: one half of 6, then one third of 6, then one quarter of 12. Each time we ask the same two questions — how many equal groups, and how many in one group? For the last one, the total on the board grows from 6 up to 12 before we share it.

    Find the fraction of the quantity together

    4 - Work It in Your Copy ~3 mins

    COPYBOOK MOMENT

    In your maths copy, find one half of 10 and one quarter of 8 by drawing the equal groups. Then write each answer as a number sentence.

    • one half of 10 = ___
    • one quarter of 8 = ___

    For one half, draw 2 groups and share the 10 fairly. For one quarter, draw 4 groups and share the 8. Count what lands in one group, then fill in your number sentence.

    Pupil practice
    Module 3 · Fractions and First Decimals Number
    Lesson 38 · Finding a Half, a Third and a Quarter of a Quantity
    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 123Learn.ie 2017 - 2026. 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