Scoring Guide for the Mango Problem
Scores will be based upon the following:
POINTS |
CORRECT ANSWER |
4 |
Answer is correct: 18 mangoes
|
0 |
Answer is not correct (other than 18
mangoes) |
POINTS |
PROBLEM UNDERSTANDING Understand the patterns, concepts, and approach
|
4 |
Shows correct understanding of the concept of fractional parts.
Shows understanding that each member of the royal household took a fraction of the remaining mangoes as
opposed to the original number of mangoes.
Recognized a pattern in the number of mangoes taken. Each person (dog) took the same number of mangoes.
|
3 |
Understands the concept of fractional parts.
Understands that fraction is a part of the remaining mangoes.
Fails to mention that every person took the same number of mangoes.
|
2 |
Understood the concept of fractional parts.
Fails to show that each person took a fraction of the remaining mangoes,
as opposed to a fraction of the orginal number of mangoes.
|
1 |
The task is misunderstood
Concept of fractional parts is applied incorrectly
|
0 |
No attempt at response
|
POINTS |
STRATEGY Choose and apply a valid strategy
|
4 |
Choice of a valid strategy:
visual representation, guess and check, or working backwards
Applied the strategy correctly and completely
Provided rationale for choice of strategy over other strategies.
|
3 |
Choice of a valid strategy: visual representation, guess and check, or working backwards
Applied the strategy correctly and completely
|
2 |
Strategy was partially or incorrectly completed.
|
1 |
Strategy did not apply to this problem.
|
0 |
No attempted strategy
|
POINTS |
COMMUNICATION Explain the reasoning at
each step, using pictures, symbols, and labels
|
4 |
Described strategy and solution clearly and completely, step-by-step
Correct presentation of solution, including appropriate labels, terminology, and symbols
|
3 |
Generally described strategy and solution clearly, step-by-step
Followed directions for presenting solution, including
appropriate labels, terminology, and symbols, but not as clearly as a 4, above.
|
2 |
Strategy was described, but steps may be missing
Labels may be missing or directions may not have completely followed
|
1 |
Strategy was not explained according
to directions or reasoning is confusing.
|
0 |
No attempt to explain
|
POINTS |
REASONABLE RESULT Review the work and show why the result is reasonable
|
4 |
Review used a diffferent approach to support the result
Review demonstrated correctness of work (show work)
Explained why the result makes sense
|
3 |
The problem was reworked using the solution to check its accuracy.
|
2 |
The check for reasonableness was not complete
|
1 |
The check for reasonableness was not valid.
0 |
No attempt was made to demonstrate the reasonableness of the result
|
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