Bar Models-Mult.& Div.

April 19, 2018

Add/Sub Fact Fluency Test date: April 26

EDC: Graphs Test April 27

Bar Models: Mult/Div. Test Date: May 8

DATA

FRACTIONS- 2017- 85%

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Fractions- 2018-83% 5/6 TEKS Mastered

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Money- 2017 63%-2018-67% 4/6 TEKS MASTERED

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Multiplication & Division Data

2018-Jan-Intro-Multiplication & Division 54%

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2018-Feb-Multiplication Tables 2, 5 and 10- 58%

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2017-Intro- Multiplication & Division 48%

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2017-Multiplication- Unit 8 49% Multiplication Tables 2, 5 and 10

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2017- Last MIF Test- Combined-Bar Models: Multiplication & Division and Multiplication Tables 3 & 4 Units 14/15

78%

Missing: Sander's/Fitzpatrick's homeroom

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BIG IDEA:

Students understand for both multiplication and division groups are always equal.

TEKS: Multiplication and Division

Number and operations. The student applies mathematical process standards to connect repeated addition to multiplication situations that involve equal groupings and shares.

The student is expected to:

Equal groups that are added (multiplication) or equal groups that are subtracted (division)

(A) model, create, and describe contextual multiplication situations in which equivalent sets of concrete objects are joined; and (repeated addition) 2 x 3 (2 how many groups and 3 how many in each group)

(B) model, create, and describe contextual division situations in which equivalent sets of concrete objects are separated and (repeated subtraction) 6 divided by 2 Six is the whole and 2 represent the number of groups How many in each group?

Multiplication

Students understand multiplication can be represented by adding equal groups.

Students can transition to creating a visual representation (bar models) using Unifx Cubes as groups (boxes, bags, people,etc). Each cube represents the SAME amount..students will use repeated addition to find the total.
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To find how many in EACH group students can use doubles..

Students have a clear understanding that multiplication is represented by using EQUAL groups.

GIVEN: Total and number of groups FIND: How many in each group.
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Division can be represented by subtracting EQUAL groups.

Students will count on EQUAL groups to achieve the total.

Given: Total, how many in each group and some of the groups.

Goal: To find how many groups in all.

Students will use the visual support given to find the number of groups needed.

Students will use cubes to count on to get to the total.

Students will draw the missing cubes.

Students will use both the related multiplication fact and repeated addition.

'8 groups of 3 make 24.'

'3+3+3+3+3+3+3+3=24'

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Great video...very easily our students can see the bar models

* may use Unifx Cubes

Review with students and send link home

2nd Grade: Multiplication by Repeated Addition
Multiplication as Repeated Addition
Intro to multiplication | Multiplication and division | Arithmetic | Khan Academy
Grade 2 - Learning multiplication facts and how you can help

Review Vocabulary!

Multiplication Vocabulary - Math Video Elementary Kids

Division

2nd Grade: Division by Sharing

Anchor Charts

Build an anchor chart the first day of the unit and revisit in whole group at the start of rotations

Hands-on Activities

May use strips of paper or Post-It notes.

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End of Unit Expectation:

Given: Part/How Many Parts

Need to find....the whole

Given: Part/Whole

Need to find.....How many parts?

Given: parts/whole

Need to find...How many in each part?

Smart Exchange

Books

Games

FLASHCARDS for 2018-2019 school year- Add & Sub

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Great Resource for teaching math templates