Grade 8 Math: Birdhouse
1A: Measures for the Two Roof Panels
Correct Responses
 All four measures correct:
 Left roof panel: length 7, width 3.1 (within +/ 2mm) AND
 Right roof panel: length 7, width 2.7 (within +/ 2mm)
Partial Responses
 Both measures for same panel are correct:
 Left roof panel: length 7, width 3.1 (within +/ 2mm) OR
 Right roof panel: length 7, width 2.7 (within +/ 2mm)
Incorrect Responses
 Any two measures correct (+/ 2mm)
 Only one measure correct (+/ 2mm)
 Other incorrect
1B: How to Convert Measurements
Correct Response
 Multiply measurements by 3
Incorrect Response
1C: Actual Measure of Left Side Wall
Correct Responses
 15 cm and 9 cm shown
 15 and 9 shown without units
Incorrect Responses
 3 cm x 5 cm
 Multiplies by 3 but incorrect multiplication
 Other incorrect
1D: Least Number of Pieces to Measure
Correct Response
Incorrect Responses
Grade 8 Math: Birdhouse
2A: Length and Width of Floor
Correct Response
 Length 17.4 cm and width 9.6 cm
Incorrect Responses
 Length 22.2 and width 9.6
 Length 7.4 and width 3.2
 Other incorrect
Grade 8 Math: Birdhouse
2B: Actual Size of Floor
Correct Responses
 At least one side 17.4 cm and one side 9.6 cm (within +/ 2mm)
 Correct dimensions based on response to Part A (within +/ 2mm)
Incorrect Responses
 One dimension correct within +/ 2mm, other dimension incorrect
 Other incorrect
