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# Math Curriculum

## Level B Units

Click on the tabs below to view the key lessons for each unit of Level B. Within each key lesson, you will find related lessons that support the key lesson’s topic. Some key lessons below are labeled as “optional.” Instructors with a faster-paced class that only needs to review major concepts might skip these lessons, while instructors whose students need more thorough coverage and review of the content or that have not completed a related unit might use these optional lessons.

Click on the hyperlinked lesson description to learn more about each key lesson. The numbers show the grade, unit, and lesson number of the lesson.

### Lesson Topic

2.5.6 Representing Three-Digit Numbers in Different Ways
2.5.10 Place Value Comparisons

### Lesson Topic

2.7.4 (Optional) Adding and subtracting three-digit numbers without regrouping
2.7.9 (Optional) Adding three-digit numbers with regrouping
2.7.15 (Optional) Decomposing tens and hundreds to subtract
2.9.1 (Optional) Sums and differences within 20
2.9.12 Word problems
2.9.13 Word problems
3.3.6
3.3.10 Subtract three-digit numbers

### Lesson Topic

2.3.5 (Optional) Measure in meters and centimeters
2.3.9 (Optional) Estimate and measure with feet and inches
3.6.3 Measure in halves and fourths of an inch
3.6.5 Mark data including halves and fourths on line plots
3.6.15 Solving measurement problems

### Lesson Topic

3.2.9 Measure to find the area
3.7.4 Rectangles, rhombuses, and squares
3.7.8 Find perimeter
3.7.12 Same area, different perimeter

### Lesson Topic

3.1.3 (Use some or all) Scaled picture graphs
3.1.8 (Use some or all) Questions about scaled bar graphs

Used with permission:

1. IM K-5 Math was originally developed by Open Up Resources (OUR) and authored by Illustrative Mathematics® (IM), and is copyrighted 2017-2019 by Open Up Resources. It is licensed under the Creative Commons Attribution 4.0 International License (CC BY 4.0). OUR's K-5 Math Curriculum is available at https://openupresources.org/math-curriculum/.

2. Adaptations and updates to IM K-5 Math are copyrighted 2019 by Illustrative Mathematics®, and are licensed under the Creative Commons Attribution 4.0 International License (CC BY 4.0).

3. The Illustrative Mathematics® name and logo are not subject to the Creative Commons license and may not be used without the prior and express written consent of Illustrative Mathematics®.

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