Reflection: Connection to Prior Knowledge Scale Drawings - Section 1: Do Now


I focused more time this year on developing an understanding for the unit rate and the ability to calculate two different unit rates given one word problem. This is reflected in my Do Nows as many changed to continue to spiral this concept.

I also changed the task slightly by getting rid of the coordinate grid example and replacing it with two separate word problems. I made this change because my students this year benefit from repetition and exposure to different examples. One of the most challenging ways to present the information is through word problems. Some of my struggling readers either do not identify the appropriate operations in the problem or do not perform them in the right order. For these students, we focus on understanding properties of math. For example, I remind them that in their 5th grade math class they were taught to use DR QVOSAC, an acronym used to remember the process for solving word problems. The V stands for visualization and it can help students identify the operation. I explain to students that a table is a great way to visualize the information. For example, one of the problems in the new worksheet states:

The scale of a model train is 1 inch to 13.5 feet. One of the cars of the model train is 5 inches long. What is the length, in feet, of the actual train car?

I review the visualization step with students using ratio tables as displayed below.


As students draw ratio tables and use them to answer rate and ratio problems, they are gaining an important strategy that aids in making sense of this concept.

  Connection to Prior Knowledge: Unit rate and ratio table
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Scale Drawings

Unit 5: Ratios and Proportional Relationships
Lesson 15 of 21

Objective: SWBAT use proportions when given scale to determine an unknown length or width in scale and actual drawings.

Big Idea: Students work in pairs and individually to solve scale problems using quadrille paper and real life examples including enlargements and reductions.

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day 97 scale drawwings
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