﻿ Free Part Whole Model Year 1 Addition and Subtraction Learning Video Clip | Classroom Secrets

# Free Part Whole Model Year 1 Addition and Subtraction Learning Video Clip

## Step 1: Free Part Whole Model Year 1 Addition and Subtraction Learning Video Clip

Dot the Dinosaur is out exploring the Jurassic world! She come across lots of interesting things but needs your help to add them altogether! Use the part-whole method to help her.

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Discussion points for teachers

1.How many berries could Dot eat now? How many could she save for later?
Discuss how many berries there are altogether. How many ways could she split the whole into two parts? This question is open-ended for children to explore.
Various answers, for example: Dot could decide to eat 1 berry and save 9 for later. Total must always equal 10.

2.How many berries are there altogether?
Discuss how you can check the ‘whole’ by adding the two parts they have created together. Regardless of how you split the whole, they should always add up to 10 when put as a whole.
Allow for a variety of answers, as long as it matches up to their ‘whole’ from question 1. Various answers, for example:
Dot had 10 berries to start with but she ate 2. She now has 8 berries altogether.

3.Help Dot complete the part-whole model.
Discuss how they will group the insects and scorpions. Discuss why the part-whole model has three sections.

4.How could Dot group the eggs to make them easier to sort?
Discuss how many eggs there are and how they are different to each other. What is similar/different about each egg? How could you sort them? Colour? Size? Pattern? Will this affect how many ‘parts’ there are?
Various answers, for example: Dot could group the eggs by colour which would create 3 groups/parts.

5.How many eggs are there altogether?
Discuss how children can use the parts they have created to create a total/whole. Regardless of how many parts, the total/whole should remain the same once adding them together.
There are 10 eggs altogether.

6.Some of the eggs have hatched! How could Dot group the eggs now?
Discuss how there is potential to create more parts now. Discuss how this affects the number of ‘eggs’ – do the ‘hatched’ dinosaurs still count as eggs now?
No, Stan is incorrect as this would mean that Dot would have 8 eggshells in total.
Various answers, for example: Dot could group the eggs in two groups – hatched, and unhatched.

National Curriculum Objectives

Mathematics Year 1: (1C1) Represent and use number bonds and related subtraction facts within 20

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