Skip counting in 5s to 20

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Students learn to skip count in 5s in different contexts. They also learn that it is useful to first count the groups of 5 and then the remaining objects.

2.NBT.A.2

Explain to students that it is useful to be able to skip count in 5s, as you can count faster.

The interactive whiteboard shows twelve apples. Ask students how they can quickly and easily count the total amount of apples. Students are not required to skip count at all in this phase, but do ask students to explain how they think they might be able to quickly and easily count the apples.

Explain that when you skip count in 5s you are counting 5 more to the first number. Ask two students to come to the front of the class and ask them to hold their hands up in front of the class, so everyone can see their fingers. Count aloud in groups of 5 as you point at their hands. The interactive whiteboard show the numbers 1 to 20 and the numbers 5, 10, 15 and 20 are blue. Explain that these are important numbers when skip counting in 5s. Next there is an image of a bead string with 20 beads. You can count this aloud in the class. Repeat this with 15 lollipops. Encourage students to do their counting as skip-counting in 5s. First count the objects in groups of 5, then count the remaining objects.

Students first practice skip counting in 5s with pictures of objects in groups of 5. Next students are asked to skip count in 5s and then count the remaining objects, and decide which number is the correct total. Next students practice again with counting, but need to decide what the correct total is. Ask students to skip count in 5s aloud as much as possible.

Check that students can skip count in 5s and ask students to explain that skip counting in 5s means that they count five more from the given number. Emphasize that skip counting in 5s is useful to be able to count groups quickly. Check again that students can skip count in 5s.

Students who have difficulty often return to counting objects 1 by 1. Encourage them to count by 5s by practicing saying the jumps of 5 on the number line together out loud. Also practice counting on from 5, 10, and 15.

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