Curriculum / Math / 3rd Grade / Unit 2: Multiplication and Division, Part 1 / Lesson 20
Math
Unit 2
3rd Grade
Lesson 20 of 21
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Lesson Notes
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Create scaled bar graphs where the scale must be determined.
The core standards covered in this lesson
3.MD.B.3 — Draw a scaled picture graph and a scaled bar graph to represent a data set with several categories. Solve one- and two-step "how many more" and "how many less" problems using information presented in scaled bar graphs. For example, draw a bar graph in which each square in the bar graph might represent 5 pets.
The foundational standards covered in this lesson
2.MD.D.10 — Draw a picture graph and a bar graph (with single-unit scale) to represent a data set with up to four categories. Solve simple put-together, take-apart, and compare problems using information presented in a bar graph.
The essential concepts students need to demonstrate or understand to achieve the lesson objective
Suggestions for teachers to help them teach this lesson
The process for doing statistics involves four main steps: formulating questions, collecting data, analyzing that data, and interpreting the results. The Anchor Tasks here will involve primarily the third step, for the sake of time. However, on the Problem Set, students will be able to engage with the first three steps by deciding on a question to ask their classmates, collecting that data, and organizing it. While students will do some interpretation of the results in this lesson, such as the most or least frequent response, the fourth step will mainly come in Lesson 28.
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Tasks designed to teach criteria for success of the lesson, and guidance to help draw out student understanding
25-30 minutes
Chris is a tailor. He is trying to figure out what color buttons he needs to stock up on. He emptied out his color buttons bucket, as shown below.
Using the buttons shown above, answer the following questions:
a. Which button color does Chris have the most of?
b. Which button color does Chris have the least of?
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Use the colors of buttons in Anchor Task #1 to create a bar graph below. Remember to label all parts of your graph.
15-20 minutes
Problem Set
A task that represents the peak thinking of the lesson - mastery will indicate whether or not objective was achieved
5-10 minutes
All the third graders at Littlewood Elementary School were asked about their favorite class. Their answers are recorded in the table below.
Make a bar graph using the data above. Remember to label all parts of your graph.
The Extra Practice Problems can be used as additional practice for homework, during an intervention block, etc. Daily Word Problems and Fluency Activities are aligned to the content of the unit but not necessarily to the lesson objective, therefore feel free to use them anytime during your school day.
Extra Practice Problems
Help students strengthen their application and fluency skills with daily word problem practice and content-aligned fluency activities.
Next
Solve one- and two-step word problems using information presented in scaled picture and bar graphs.
Topic A: The Meaning of Multiplication and Division
Identify and create situations involving equal groups and describe these situations using the language and notation of multiplication.
Standards
3.OA.A.1
Identify and create situations involving arrays and describe these situations using the language and notation of multiplication.
Identify and create situations involving unknown group size and find group size in situations.
3.OA.A.13.OA.A.23.OA.A.3
Identify and create situations involving an unknown number of groups and find the number of groups in situations.
Relate multiplication and division and understand that division can represent situations of unknown group size or an unknown number of groups.
3.OA.A.13.OA.A.23.OA.A.33.OA.B.6
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Topic B: Multiplication and Division by 2, 5, and 10
Build fluency with multiplication facts using units of 2, 5, and 10.
3.OA.A.13.OA.C.7
Demonstrate the commutativity of multiplication.
3.OA.B.5
Build fluency with division facts using units of 2, 5, and 10.
3.OA.A.23.OA.B.63.OA.C.7
Solve one-step word problems involving multiplication and division using units of 2, 5, and 10.
Topic C: Multiplication and Division by 3 and 4
Build fluency with multiplication and division facts using units of 3.
3.OA.A.13.OA.A.23.OA.B.53.OA.B.63.OA.C.7
Build fluency with multiplication and division facts using units of 4.
Solve one-step word problems involving multiplication and division using units of 3 and 4.
Topic D: More Complex Multiplication and Division Problems
Determine the unknown whole number in a multiplication or division equation relating three whole numbers, including equations with a letter standing for the unknown quantity.
3.OA.A.43.OA.C.73.OA.D.8
Solve one-step word problems involving multiplication and division and write problem contexts to match expressions and equations.
Solve two-step word problems involving multiplication and division.
3.OA.D.8
Solve two-step word problems involving all four operations.
Topic E: Scaled Picture and Bar Graphs
Create scaled picture graphs where the scale is provided.
3.MD.B.3
Create scaled picture graphs where the scale must be determined.
Create scaled bar graphs where the scale is provided.
3.MD.B.33.OA.D.8
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