Math Spring Operational 2015 Grade 5 PBA Item #11 Time on Chores M02372
Prompt
Rubric Task is worth a total of 3 points. M02372 Rubric Score Description 3 Student response includes each of the following 3 elements. Reasoning component = 2 points o Correct label for point A, 1 2 hour or equivalent o Correct explanation of how to use the number line to solve the problem Computation component = 1 point o Correct fraction of an hour spent per chore, 1 10 or equivalent Sample Student Response: Point A should have the label 1 2 hour. The number line is divided from 0 to 1 in 5 equal sections because 2 there are 5 chores. It would take 10 of these sections to divide the number line from 0 to 1. Each section represents the time she can spend on one chore. So she can spend 1 of an hour on each chore. 10 2 Student response includes 2 of the above elements. 1 Student response includes 1 of the above elements. 0 The response is incorrect or irrelevant.
Anchor Set A1 A8
A1 Score Point 3
Annotations Anchor Paper 1 Score Point 3 The response receives full credit. It includes each of the three required elements: The student correctly determines the label for point A ( 1 2 ). Note: The label 1 does not require the units hour because the given number line 2 clarifies the units by labeling the endpoint 1 hour. The student provides a valid explanation of how to use the number line by describing the method of dividing the number line in equal sections and clarifying that each section would show the time spent on each chore (She has 5. Then you put it on the number line going up to label A... multiply 5 by 2 because those 5 did not fill the whole number line up... each rectangle on the number line represents 1 10 ). The student finds the correct fraction of an hour spent per chore ( 1 10 ).
A2 Score Point 3
Annotations Anchor Paper 2 Score Point 3 The response receives full credit. It includes each of the three required elements: The student correctly determines the label for point A (30 minutes). The student provides a valid explanation of how to use the number line by describing the method of dividing the number line in equal sections and clarifying that each section would show the time spent on each chore (If you split it up between 0 and point A into 5 parts that s how much time she spends on each chore is each little part). The student finds the correct fraction of an hour spent per chore ( 1 10 ).
A3 Score Point 2
Annotations Anchor Paper 3 Score Point 2 The response receives partial credit. It includes two of the three required elements: The student correctly determines the label for point A (30 minutes). The student finds the correct fraction of an hour spent per chore ( 1 10 ). [6 minutes is not credited since it is not a fraction] The explanation of how to use the number line (do 30 5) is incorrect since the expression does not reference the number line. The solution is determined by using a math process; not the blocks of the number line.
A4 Score Point 2
Annotations Anchor Paper 4 Score Point 2 The response receives partial credit. It includes two of the three required elements: The student correctly determines the label for point A ( 5 10 ). Note: The label does not require the units hour because the given number line clarifies the units by labeling the endpoint 1 hour. The student provides a valid explanation of how to use the number line by describing the method of dividing the number line in equal sections and recognizing that each section would show the time spent on each chore (it is only shaded in half of the hour with little deviders in between to show the five chores). The answer (6 minutes) does not receive credit. Even though it is the correct portion of an hour spent on each chore converted into minutes, it is not expressed as a fraction.
A5 Score Point 1
Annotations Anchor Paper 5 Score Point 1 The response receives partial credit. It includes one of the three required elements: The student finds the correct fraction of an hour spent per chore ( 1 10 ) but the label for point A is not determined. The explanation of how to use the number line (Take one half and divide it into 5) is not correct as it describes the math process to find the answer but does not reference the number line.
A6 Score Point 1
Annotations Anchor Paper 6 Score Point 1 The response receives partial credit. It includes one of the three required elements: The student correctly determines the label for point A (30 minites). The explanation of how to use the number line (30 divided by 5 equals 6) is not correct as it describes the math process to find the answer but does not reference the number line. The fraction of an hour spent per chore is incorrect ( 1 12 ).
A7 Score Point 0
Annotations Anchor Paper 7 Score Point 0 The response receives no credit. It includes none of the three required elements: The label for Point A (30) does not receive credit as it does not include units [minutes]. Since the number line shows time in hours, 30 would be incorrect answer unless it is clarified as minutes. The explanation of how to use the number line (30 6 = 5) is not correct as it describes the math process to find the answer but does not reference the number line. The fraction of an hour spent per chore is incorrect ( 4 10 ).
A8 Score Point 0
Annotations Anchor Paper 8 Score Point 0 The response receives no credit. It includes none of the three required elements: The response ( 1 2 an hour) does not receive credit as it is seen as each section of the number line (You would draw a line in every box and that would represent 1 an hour), not as the 2 label for point A. The student does not provide an explanation of how to use the number line. The student does not determine the fraction of an hour spent per chore.
Practice Set P101 - P105
P101
P102
P103
P104
P105
Practice Set Paper Score P101 2 P102 1 P103 3 P104 1 P105 2