Grade: 8 Pre-Algebra Assessment - DOC

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```					                                   Grade: 8      Pre-Algebra Assessment
Power Standard: #4- Explore, Compare and Set Up Rates, Ratios, and Proportions

Engaging Scenario           Concepts             Skills                            Big Ideas                         Essential Questions
If Barbie was the size of         Scale                 Draw                           Proportions are used to          How do scale drawings work?
an average woman and              Charts                Create                          draw or make items to            If you use different scale
Ken an average man, what          Measurement           Reading a tape measure          scale.                            factors does it create different
would they look like? If          Ratios                Compare                                                           answers
the Batman action figure          Proportions           Write                          Scaling by the foot size
or the Stone Cold action          Similarity            Solve                           is not proportional to
figure was the size of an                                                                 scaling by the head
average man, what would                                                                   size.
his proportions be?
Let’s find out!!
Power Standard: #4
Description                             Materials Needed                    Rubric
Have students work with a partner             Measuring tape               Exemplary:
or in groups. Instruct them to take           Barbies and action figures        Completed all of the requirements for proficient work
the following measurements of a               Pencil                            Advanced work also includes measuring diameter of head, length of forearm,
doll or action figure: height, head           Paper                                hand, shoulder to waist, and waist to ankle
(circumference), chest, waist,                Worksheet                    Proficient:
Task 1   inseam, and foot (length). The                                                   All work is shown
measurements are written in the                                                  All materials are returned neatly to their appropriate places
first blank column of each of the                                                Measurements are made accurately
in the chart are the average                                                Progressing:
measurements for the figures. The
 All information not completed
students will use these numbers to
 All measurements must be complete to go on
calculate their size change
Non-Proficient:
magnitudes.
 Need to repeat the task

Once students have completed the              Worksheet                    Exemplary:
measurements, walk them through               Pencil                            Completed all of the requirements for proficient work
the fist conversion, using height to          Calculator                        Advanced work also includes answers in complete sentences with all answers
be the first standard. For ex. if             Paper                                correct
Barbie is 12 in. tall and the average                                       Proficient:
Task 2   woman is 65 in. tall, what would                                                 All work is shown
the other enlarged measurements                                                  All answers are neat and easy to read
be? Divide 65 by 12 to get a ratio                                               Chart is completed
of 5.6, and then multiply each of                                           Progressing:
the measurements by this ratio.                                                  Work is not shown on all answers
This represents one “possible”
body shape. The next conversion
 Chart is incomplete
will use 21 inches as the standard
 Questions are not completely answered
for the head. Calculate this new
ratio and repeat the process. Allow                                         Non-Proficient:
the students to complete the chart                                               Work is not shown on any answers
by calculating the conversions for                                               More than 30 percent of chart is incomplete
the other standards. Complete the                                                More than 30 percent of questions are unanswered
worksheet.                                                                       Need to repeat the task
Power Standard: #4
Description                              Materials Needed                    Rubric
Assign each group to draw their              Butcher paper                  Exemplary:
figure in real-life size according to        Pencils                             Completed all of the requirements for proficient work
the body part you assign them.               Colored pencils                     Advanced work also includes adding color, facial features, and stylish clothing
Assign a different body part to each         Markers                        Proficient:
group that has a Barbie and a                Action figure or Barbie used        Figure is drawn to scale
Task 3   different body part to each group that           in task 1                        Figure is drawn neatly (no smudges, extra marks, etc.)
has an action figure. When pictures          Measuring tape                      Figure is drawn dark enough to display
are complete have the students attach                                             Worksheets are displayed on project
 Tape
their charts and answers to questions                                        Progressing:
to the drawing and hang up in the
 Some attributes are not drawn to scale
room.
 Figure is not neatly drawn (smudges and extra marks on drawing)
 Figure is drawn too light to display to room
 Worksheets are not displayed on project
Non-Proficient:
 Figure is not drawn to scale
 Need to repeat the task

Take measurements of yourself and              Measuring tape               Exemplary:
scale them backwards (reduce them)             Calculator                        Completed all of the requirements for proficient work
to determine the dimensions of a doll          Pencil                            Advanced work also includes a detailed drawing to scale and in color
or action figure modeled after you.            Graph paper                  Proficient:
Write a paragraph describing what                                                 Chart made to display your measurements and scaled down measurements
Task 4   you would look like as a doll. You                                                Paragraph must be written in complete sentences with correct punctuation and
may also draw a picture to illustrate.                                               spelling
Progressing:
 Two of the measurements are not to scale
 The paragraph contains three or less mistakes
Non-Proficient:
 The measurements are not to scale
 The paragraph contains more than three mistakes
 Need to repeat the task

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