Eighth Grade: Mathematics
Unit#1: Exploring Linear and Inverse Realtionships
Formative Assessment Task- Assessment FOR Learning
Lesson Title: Jet Ski Rental
http://www.mansfieldisd.org/curriculum/mathematics/pdf/6th/texteams%20Proportionality.pdf
Give Assessment:
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Access the link above and print copies of
pages 61 and 63 to give to students.
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Prior to giving this assessment, students should have experimented with a
activities in which they learned about proportional relationships and their graphs.
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Have students do this activity individually or in pairs.
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Students share their work with the class. Key ideas include constant ratio and
proportional relationship. They should be prepared to answer questions as they
arise and defend their method of arriving at the correct response to questions
involving cost for a specified time period or given a specific amount of money,
how much time could the jet ski be rented. Students should also be able to make
connections between the information in the table, on the graph, and in the
equation.
Select and Share Representative Solutions:
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Select students to share their results with the
class.
Summarize:
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Engage the class in a discussion of their
findings regarding the selected tasks.
• What characteristics of a situation make it proportional? How could you identify a
proportional relationship if you were given just a table? just a graph? just an
equation? Students should be able to explain how the constant of proportionality
is seen in each representation as well as the meaning of any given point on the
graph.
Re-engagement:
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Give students a new set of similar tasks.
http://www.mansfieldisd.org/curriculum/m
athematics/pdf/6th/texteams%20Proporti
onality.pdf
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This document is the property of MAISA.
Students will complete new tasks as homework.
Pages 57 and 59 provide a similar scenario, but a deposit is required, which yields
a non-proportional relationship. When assigning this task, ask students to
compare this task with the previous one, for similarities and differences.
Page 65 gives students the opportunity to communicate their understanding about
proportional relationships verbally and by identifying proportional ad nonproportional relationships form a given table or graph.