## Reflection: Backwards Planning Build A Rectangle With A Given Area - Section 3: Partner Work

This is a crucial lesson and practice prior to the lesson on constructing a nest box because the students use this skill as the first step.  I wanted to make sure my students could successfully design a rectangle to a given area and determine the best dimensions for a given task.

While the students easily found the areas using factors of two, five, and ten, they were less likely to use factors of three, four, and six.

One key area to focus on in this lesson is the use of place value and knowledge of doubles.  It is also helpful to make sure students have had many experiences building array with counters or tiles to rearrange to create an area.

Backwards Planning
Backwards Planning: Backwards Planning

# Build A Rectangle With A Given Area

Unit 3: Measurement
Lesson 10 of 13

## Big Idea: This lesson moves students from whole to part/part thinking, using area as the whole and finding ways to work backwards to determine the parts.

Print Lesson
1 teacher likes this lesson
Standards:
Subject(s):
Math, Number Sense and Operations, Measurement, multiplication, area of rectangle, multiplication models, Critical Areas
40 minutes

### Diane Siekmann

##### Similar Lessons

###### Sorting Out Perimeter
7th Grade Math » Exploring Area & Perimeter
Big Idea: The structure of the figure is what determines the formulas for area and perimeter.
Favorites(2)
Resources(16)
Dixon, CA
Environment: Suburban

###### How Much Paint Do We Need?
3rd Grade Math » Going Batty Over Measurement and Geometry
Big Idea: This lesson is a real world task that combines many skills the students have learned throughout the school year.
Favorites(3)
Resources(8)
Troy, MI
Environment: Suburban