# Session 2 Big Ideas Building a Solid Number Foundation Strategies for Education Assistants 1.

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Session 2 Big Ideas Building a Solid Number Foundation Strategies for Education Assistants 1

Mapping Ideas Mind Map Place the topic in the centre (Mathematics Big Ideas) Around the topic, write words or phrases that relate to the main topic (eg: subitizing) Use colour, graphics, key words to link your ideas. http://www.mindmapping.com 2

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What is number sense? 5

Number Sense Is the foundation for mathematics Is about discovering relationships Is exploring and visualizing numbers 6

What is REALLY important in numeracy? Subitizing Partitioning Patterning 7

Subitizing 8

The BIG ideas: Subitizing Counting tells “how many” Numbers are related to each other Number concepts are tied to the real world Addition and subtraction are related to each other 9

Subitizing Name each quantity 10

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Activity Using the index cards and the dots on your table, make a “Show Me Quick” dot card. Place some of the dots in a random pattern on an index card. Keep your dot card number to yourself while making it. 12

Eg: What’s missing..? Choose a target number Find two dot cards that can be put together to make the target number Place the cards together with the dots facing up Pick up one of the cards and ask what card is missing? 13

Table Talk How might you use the activity/idea that we just went over with students who you work with? Add ideas to your Mind Map 14

Partitioning 15

Partitioning Breaking a set into parts and putting it back together again Building an understanding of addition and subtraction Allowing students to explore and understand “why” fact families exist 16

Activities… Two-Part Bags Story Mats Make 10… 17

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