Beginner
40 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:
Interlocking cubes

The Plus Sign, the Joining Sign

In this lesson you will discover how the plus sign joins two numbers together. You will read plus stories like three plus two and build them with cubes and on the ten-frame, in two colours, to see the parts combine.

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    Manipulative task

    1 - Getting Started ~3 mins

    Illustration for Getting StartedLook at this giant + sign! You have seen it before, maybe in a book or on the board. Where have you seen it? What do you think it tells us to do?

    2 - Watch and Notice ~7 mins

    The + sign is the joining sign. It says and (or plus). A plus story is two numbers with a + between them. Here are three plus stories on the ten-frame: 3 + 2 means three and two more, in two colours on one frame.

    3 - Try It Together ~8 mins

    Three red cubes, a plus sign and two yellow cubes. Below, the same five cubes joined into one stick.

    Now build the plus stories with your own hands. Make the first number in one colour and the second number in the other colour. Then join them together, because that is what the + sign does.

    We will build 2 + 3, then 4 + 2, then 6 + 3, then 5 + 4. Hold up each one and read it out loud: ___ plus ___.

    Build the plus story

    4 - Write the Plus Sign in Your Copy ~2 mins

    COPYBOOK MOMENT

    Watch the board first: we cross two straight arms to make a clean +. Then, in your maths copy, write 3 + 2 and 4 + 1, forming the + sign carefully.

    • 3 + 2
    • 4 + 1
    Pupil practice
    Module 2 · Addition Within 20: Combining, Plus and Equals Number
    Lesson 14 · The Plus Sign, the Joining Sign
    Download Activity Book page (PDF)
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