Modeling+with+Ratios+and+Proportions

The purpose of this activity is to have students demonstrate their knowledge about the relationship between ratios and proportions through a hands on exploration/problem solving task. The students will need to bring an object to class that is easily measurable and re-creatable. As an example, the teacher will have an object and a re-creation that is similar; for example, an . The goal is to have the students be able to create an accurate representation of their own object by using ratios and proportions. The students will also be able to explain, using mathematical language, how/why their objects are similar.
 * Purpose of the Activity – **

Students will be able to recognize and represent proportional relationships between quantities. Washington State Common Core Mathematics Standard 7.RP.2 – Recognize and represent proportional relationships between quantities.
 * Learning Target – **
 * Standard – **

The assessment results of the student’s individual project and the assessment results of the class as a whole will determine if the material was adequately taught and learned. Students will be assessed through the use of the attached worksheet and . Allowing that at least 80% of the class was able to complete the worksheet with a rubric score of at least a 2 in Accuracy, than the class will move on; otherwise the material will be retaught using a different form of instruction. The Accuracy portion of the rubric demonstrates the student’s ability to meet the stated learning target of 7.RP.2.
 * Assessment – **

Step One – Select an object with at least four key characteristics. (i.e. length, width, thickness, design) Step Two – Complete the worksheet  by taking careful measurements of the selected object. Step Three – Using the completed worksheet, re-create the object. Step Four – Bring the re-creation and original object to school to share with the class and for final assessment.
 * <span style="font-family: 'Times New Roman','serif'; font-size: 16px;">Directions – **


 * <span style="font-family: 'Times New Roman','serif'; font-size: 16px;">Materials – **
 * <span style="color: black; font-family: 'Times New Roman','serif'; font-size: 16px;">Measuring devices
 * <span style="color: black; font-family: 'Times New Roman','serif'; font-size: 16px;">Object
 * Worksheet [[file:middlelevelmathcwu/Ratio and Proportions Worksheet.docx|Ratios and Proportions]]
 * [[file:middlelevelmathcwu/Ratios and Proportions Rubric.docx|Rubric]]

Janice Ramsey, Sarah Bottoms, Casie McNeely