Page 42 - Demo

Lesson 19: Grobby partitions a set of 9 into 2 partsThrough appropriately playful learning experiences, children should be able to recognise and understand what happens when quantities (sets) are partitioned and combined.TasksLearning outcomes%u2022 We are learning to find ways to make 9 using 2 sets%u2022 We are learning to find the total of 2 sets when combined%u2022 We are learning to make and count 9 objectsMaterialsA set of 9 bricks, 2 hula hoops (1 red and 1 blue - different colours are preferable as they allow you to talk about the contents of each without confusion), a large cut out %u2018+%u2019 sign, the task sheet and two 30cm strings for each pair.ProcedureGather all the children together on the floor. Set down the 2 hula hoops and the %u2018+%u2019 sign between them.Set down the 9 bricks above the hula hoops.Ask the children: What have I got on the floor? This should elicit: We have 2 hula hoops, 9 bricks and an adding sign or a plus sign, and an equals or makes sign.Ask a child to take some of the bricks and place them in the red hoop e.g. 3. Ask another child to take the remaining bricks and place them in the blue hoop. How many bricks had we to start with? (9) Have we still got 9? How are the 9 now arranged? Record as 3 + 6 = 9.How can we be sure that 3 bricks plus 6 bricks, make 9 bricks altogether? We combine and recount. Recombine, recount and record the answer as 3 + 6 = 9.Now place the 9 bricks once again outside the hula hoops and find other ways to separate and then combine the bricks to make 9. Record all the ways as you go, perhaps on a large sheet of paper or on the whiteboard.1. The children, in pairs are tasked to find and record ways to make 9 using 2 sets. They use 2 strings to make two circles/hula hoops. Into the circles they distribute their 9 bricks.2. Draw 9 footballs in the box40