The following 9 Anchor Papers represent a range of score points and are used in conjunction with the rubrics to assess student responses.

Score for Anchor Paper #1: Rubric Score 1

Annotation: This response indicates little attempt to apply a reasonable strategy. The student gives an incorrect answer for when the price of a postage stamp was 29 cents (40 years after 1950) and the explanation is missing. A correct answer of 9 cents is given for the cost of a postage stamp in 1970 but the explanation is missing. The response demonstrates a minimal understanding and analysis of the problem.

Score for Anchor Paper #2: Rubric Score 1

Annotation: This response indicates little attempt to apply a reasonable strategy. The student gives an answer (After 41 years) for when the price of a postage stamp was 29 cents but does not include that it was 41 years since 1950. The explanation is correct. Both the answer and explanation for the cost of a postage stamp in 1970 are missing. The response demonstrates a minimal understanding and analysis of the problem.

Score for Anchor Paper #3: Rubric Score 1

Annotation: This response indicates little attempt to apply a reasonable strategy. The student gives a correct answer for when the price of a postage stamp was 29 cents (42 years after 1950) and the explanation supports this answer. Both the answer and explanation for the cost of a postage stamp in 1970 are missing. The response demonstrates a minimal understanding and analysis of the problem.

Score for Anchor Paper #4: Rubric Score 2

Annotation: This response indicates an incomplete application of a reasonable strategy. A correct answer (1992) is given for when the price of a postage stamp was 29 cents and the explanation supports the solution. A correct answer of 9 cents is given for the cost of a stamp in 1970 but the explanation is missing. The response demonstrates a conceptual understanding and analysis of the problem.

Score for Anchor Paper #5: Rubric Score 2

Annotation: This response indicates an incomplete application of a reasonable strategy. Although a correct answer is not given for when the price of a postage stamp was 29 cents, the explanation, substituting 29 for "y" in the equation, would support a correct answer. The answer (8.68) for the cost of a stamp in 1970 should be rounded to 9 cents to be completely correct. The explanation, substituting 20 for "x" in the equation, is correct. The response demonstrates a conceptual understanding and analysis of the problem.

Score for Anchor Paper #6: Rubric Score 2

Annotation: This response indicates an incomplete application of a reasonable strategy. Although an incorrect answer is given for when the price of a postage stamp was 29 cents, the explanation would support a correct answer. A correct answer of 9 cents is given for the cost of a stamp in 1970 and the explanation supports the solution. The response demonstrates a conceptual understanding and analysis of the problem.

Score for Anchor Paper #7: Rubric Score 3

Annotation: This response indicates application of a reasonable strategy that leads to a correct solution in the context of the problem. A correct answer (1992) is given for when the price of a postage stamp was 29 cents and the explanation supports the solution. A correct answer (9 ¢) is given for the cost of a stamp in 1970 and substituting 20 for "x" in the equation provides a fully developed explanation. The response demonstrates a complete understanding and analysis of the problem.

Score for Anchor Paper #8: Rubric Score 3

Annotation: This response indicates application of a reasonable strategy that leads to a correct solution in the context of the problem. A correct answer (1992) is given for when the price of a postage stamp was 29 cents and the explanation is fully developed. A correct answer (9¢) is given for the cost of a stamp in 1970 and the explanation supports the solution (I followed the graph this time x must = 20 because 1950+20=1970. Following the point is at approx. (20, 9)). The response demonstrates a complete understanding and analysis of the problem.

Score for Anchor Paper #9: Rubric Score 3

Annotation: This response indicates application of a reasonable strategy that leads to a correct solution in the context of the problem. A correct answer (1992) is given for when the price of a postage stamp was 29 cents and the explanation is fully developed. A correct answer (9¢) is given for the cost of a stamp in 1970 and the explanation supports the solution. The response demonstrates a complete understanding and analysis of the problem.

Additional Scored Student Responses