# “The number “2” very often describes pairs”

Subject:

Math

PreK, K

Title – Lesson Plan: Number “2” and the “Symmetrical Human Body”
By – Gisela Hausmann
Primary Subject – Math
Grade Level – PreK – K – ESE

Time: 30 minutes

Materials: CD-book “Hands on Mathematics, Numbers from 1-10” (optional), one copy of “Worksheet Number 2” per child, crayons in a variety of colors

Objective: To reinforce the memorization of “number 2” via auditory, visual, and kinesthetic methods.

Process:

1)  Explain: The number “2” very often describes pair. Name: e.g. a “pair of shoes”, name a more difficult one: “a pair of pants has 2 leg parts.”

2)  Ask the children what “pairs of something” they see in the room. Each pair of something can be named only once. Make a checkmark for each item named on the blackboard.

3)  Explain that the body of humans is symmetrical which means that any body part which is one the one side is on the other side as well. Ask the children if they now can find more pairs. E.g. a pair of thumbs, pinkies, etc. Again, make a checkmark for each item named on the blackboard so they children can see how many pairs they found.

4)  Discuss that that 2 very often describes a pair, things that go together, but at the same time it also describes opponents = people or groups that try to win against each other (soccer teams, baseball teams, etc.) and opponents cannot do without another one. Ask who plays a sport with teams who try to win against another team.

5)  Do worksheet 2.

Tell the children that once they are finished you are going to collect the sheets to put 2 stickers on it for great work.

Bonus:
Teach adding for the first time:

Allow the children to play a game of “tic-tac-toe”. Reinforce that each pair of children will now become opponents for this game. Pick 2 kids, and explain: “1 special …name…” is now going to play against “1 special …name…”.

So, obviously, 1 + 1 = 2.

Then, tactfully, explain subtraction. After the game, 1 of the opponents will have won. Therefore, of the original 2 opponents, only 1 will remain. 2 minus 1 = 1. And, of course, both of them are special.

### Worksheet 2

Visual/Kinesthetic Exercises

 O O O O O O O O O O
On the left are 10 circles, please color 2 circles in the color of your choice. The 2 circles need to be next to each other. If you have done this exercise before, please make sure that you color different circles than last time.

Please draw a picture that represents the number “2”.

This could be a pair of something (shoes, socks, pants, glasses, earrings, …) Have your parent write the name of the item underneath.

Can you tell me the “important fact” about the number “2”?

Name one item that comes as “2” only (pair or opponents), Then I, the parent or person that is playing this game with you, will name one item that comes as “2” only. Then, it is again your turn. Let’s see if we can name five pairs or opponents each.

[Parents: if in the top exercise (“color circles”) your child colors vertical pairs possibly every time s/he does it, your child has already a highly developed, structured sense for math. If your child colors horizontal pairs, s/he is very creative.]

Ã‚Â© by Gisela Hausmann, July 2004 and 1997, “Hands on Mathematics” @educeasy@bellsouth.net
Permission for publication under Gisela Hausmann is granted.

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