Learning intention
Students will learn how to:
add to 20 using concrete materials.
Success criteria
I will know I have been successful if I can:
put 2 groups of objects together and count them to find the total.
Prerequisites
- Numbers to 20
- Count up to 20 objects (cardinality)
- Addition within 10 (counting all)
Language
Reinforce the use of language related to addition: combine, join, makes, all together, how many more?
Before the video
- Clap and count from 1 to 20. Repeat getting faster each time.
- Put students in pairs and have them add 2 groups of objects (up to 10). Ask students what kinds of words they used when they were adding the 2 groups.
During the video
First viewing:
Watch the video without stopping or pausing. Then, ask the children to explain what happened in the video. Begin to draw out key vocabulary or possible misconceptions.
Second viewing:
| Pause point | Key learning | Action/discussion |
|---|---|---|
| 1:49 | Finding the total of 2 groups | Take 2 groups of objects. Count the number in each group. Find the total as a class by counting from 1. |
| End | Counting on as a strategy or skip counting | Can you think of an easier way to find the total? |
After the video
Addition stations:
- Provide beads, books, toys (or other objects).
- Recap the addition method from the video then model combining 2 groups of objects by counting from 1.
- Pair work: One student chooses the first quantity, the other chooses the second. How many do they have altogether? Repeat 3 times at each station. Record totals on a big sheet of paper.
Game: Let’s Add
- Provide pairs with Mathletics number cards 1–10 and counters
- Player 1 turns over 1 card and counts out that number of counters. Player 2 turns over a second card and counts out that number of counters. Player 1 counts all the counters to find the total and receives 1 counter if they find the correct total. The winner is the first to get 3 counters. Repeat with player 2 going first.