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# Work the Following on Your Own Paper… - PowerPoint PPT Presentation

Work the Following on Your Own Paper…. Luis mixed 6 ounces of cherry syrup with 53 ounces of water to make a cherry-flavored drink, Martin mixed 5 ounces of the same cherry syrup with 42 ounces of water. Who made the drink with the stronger cherry flavor?

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### Work the Following on Your Own Paper…

Luis mixed 6 ounces of cherry syrup with 53 ounces of water to make a cherry-flavored drink, Martin mixed 5 ounces of the same cherry syrup with 42 ounces of water. Who made the drink with the stronger cherry flavor?

Give mathematical evidence to justify your answer.

### Let’s Discuss

Looking at some responses…

What is the mathematical evidence?

What makes “good” explanation?

• Create a set of 4 related, but simpler problems

• Each group should work one problem

• Work together

• Make sure everyone in the group can solve the new problem

• Be ready to share the solution and solution strategy

• Share the solution and solution strategy with your new group

• Look back to the original problem and discuss with the group

• Was your thinking correct on the original problem?

• Did you use a similar strategy on the simpler problem and the original problem?

• Can you apply a new strategy?

• A grading rubric is used to show students exactly what the expectations are for a task that is being assessed.

• Rubrics help provide some credit for correct thinking even if the answer to the task is not exactly right.

• Typically, a rubric scores with points ranging from 0 to 4 and includes a description of the characteristics of a response that ranks at each levels.

• Share your characteristics for each level beginning with level 0

• Record each groups’ ideas in one list

• Decide upon a rubric for the whole class

How did you do?

• Assess the following student responses using our rubric.

• As you assess other student work, think about

• What constitutes a complete justification?

• Why is the justification important?

• Compare the rubric your class created to the scoring guide from NAEP

• Compare your scoring of student work to the score NAEP would assign

Abby found a recipe for humming bird nectar. The recipe called for 2 cups of sugar and 3 cups of water. Abby only had 1 ½ cups of sugar. What amount of water should she use to make the nectar?

• 1 cup

• 2 ¼ cups

• 2 ½ cups

• 2 cups

Abby found a recipe for humming bird nectar. The recipe called for 2 cups of sugar and 3 cups of water. Abby only had 1 ½ cups of sugar. What amount of water should she use to make the nectar?

Choice b.)

Abby found a recipe for humming bird nectar. The recipe called for 2 cups of sugar and 3 cups of water. Abby only had 1 ½ cups of sugar. What amount of water should she use to make the nectar?

Choice c.)

Abby found a recipe for humming bird nectar. The recipe called for 2 cups of sugar and 3 cups of water. Abby only had 1 ½ cups of sugar. What amount of water should she use to make the nectar?

Choice d.)

Abby found a recipe for humming bird nectar. The recipe called for 2 cups of sugar and 3 cups of water. Abby only had 1 ½ cups of sugar. What amount of water should she use to make the nectar?

Abby found a recipe for humming bird nectar. The recipe called for 2 cups of sugar and 3 cups of water. Abby only had 1 ½ cups of sugar. What amount of water should she use to make the nectar?

• What other answer choices might distract someone from the correct answer?

• Luis mixed 6 ounces of cherry syrup with 53 ounces of water to make a cherry-flavored drink, Martin mixed 5 ounces of the same cherry syrup with 42 ounces of water. Who made the drink with the stronger cherry flavor?

• What answer choices would make good distractors?

• On a scale of 1 to 5 (1 being extremely confident, 5 being not at all confident), rate your level of confidence in solving a problem involving a proportion. Explain your rating.

• What are the important understandings necessary for solving a problem involving quantities that relate in proportion to one another?