# Math Lesson Plan: Popsicle Stick Regrouping Fun Place toothpicks showing 40 + 3 to begin the question.

Objectives:

1. Learning and practising regrouping
2. Print examples of regrouping in student math journals
3. Learn term names:  minuend take away subtrahend equals difference/answer (for subtraction) and addend plus addend equals sum/answer (for addition)

Materials for each group of 4-6 students:

1. twenty groups of 10 popsicle sticks or toothpicks gathered with an elastic, plus 10-20 loose popsicle sticks (students can count out sets of 10 on their desks and you can help them wrap the elastics around them)
2. index cards with numerals 0-9 on them, one number on each card, as well as cards printed with  “+” ,  “-“, “Ones”, “Tens”, and “Hundreds”, PLUS SOME BLANK INDEX CARDS (for the answers).
3. math journals for each student
4. pencils and erasers for each student
5. Chalkboard or Chartboard showing an example of one addition question plus one subtraction question, heading up the columns with “Hundreds”, “Tens” and “Ones”.  The title above the two questions says “Regrouping”.
6. Marker for each group (to write the numerals needed for the answer cards) Regroup showing students the 20 + 9 you've taken away to end up with 10 + 4 which is the answer 14.
1. Each group of students finds an area to sit in a group, either in a gathering of their 4-6 desks or on the floor somewhere.  Teacher gives each group ten numeral cards 0-9, plus cards with “+”, “-“,  “Ones”, “Tens” and “Hundreds”, plus some blank index cards.  Also give twenty bunches of 10 popsicle sticks gathered with elastics, plus 10-20 loose popsicle sticks.   They each have their pencils and erasers and math journals with them.
2. Teacher tells students, “We are going to practise regrouping.  First we’ll ‘make’ the number with the cards, then we’ll ‘make’ the number with the popsicle sticks.  We’ll learn how to ‘regroup’ the digits so that we can add or subtract the numbers really easily.”(Teacher info:  I mix the grades in the groups, so that all groups comprise of both grades; the grade 2’s LOVE to help the grade 1’s master this.  Grade 1’s just have to add or subtract to 100, Grade 2’s up to 200.)
3. Teacher then calls all students together in a learning circle and tells them that we’re going to do the first few questions together.  Work with the students as a group for a few minutes until they ‘get’ the idea.
4. Put down a card that says “Ones”.  Tell students that only numbers with one digit can go under this card.  Have them tell you all the numbers with one digit (1, 2, 3, 4, 5, 6, 7, 8, 9).  Tell students that therefore only up to 9 popsicle sticks can STAY** under this column.   Once you have 10 popsicle sticks, you need to regroup them into a group of 10 with an elastic around them and move them into another group.
5. Put down the “Tens” card to the left of the “Ones” card.  Tell students that only up to 9 groups of ten popsicle sticks can STAY** there (**This is important because when you regroup later you will have to add 10 to a number in the Ones column so you may have 13 popsicle sticks in the Ones column for a minute or too**).  Once you get 10 groups of 10 popsicle sticks, (100, count by 10’s so they see that it’s 100) they have to go into a new column “Hundreds”.  Put that card to the left of the “Tens”.
6. Ask  a student to give you a two digit number (43).  Teacher puts down the card 4, then the card 3.  Ask for another number  (21).   Teacher puts down the card 2, then the card 1.  Line them up above each other, in tens and ones and hundreds columns.  Put the card “+” in front of the 21.
7. Get students to help you put the correct number of popsicle sticks on each number card.  Example:    3 popsicle sticks go on the “3” card.  4 groups of 10 popsicle sticks go on the “4” card EQUALING 43.  Ask students what number this makes.  Have them count the popsicle sticks to make sure it’s correct…10, 20, 30, 40, 41, 42, 43.
8. Do the same for 21….10, 20, 21.  Popsicle sticks sit on top of each numeral card.  Example 2 groups of 10 sit on the 2 and 1 single popsicle stick sits on the 1 card.