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DP mathematical studies SL: internal assessment—teacher support material
Examples of student work
32 © International Baccalaureate Organization 2005
This section provides examples of student work, which highlight both good and bad practice in producing projects. Please note: only excerpts of work are included here, not complete projects. A later section provides four examples of complete student projects.
Examples of good practice
Example 1 The student has produced a written plan that is clearly set out, and explains in detail what the student intends to do.
Example 2 The student has produced a plan that is set out as a series of steps to follow.
Example 3 The student has thoroughly discussed the results obtained.
Example 4 The student has discussed the results obtained and has attempted to discuss the validity of the processes used.
Example 5 The student has discussed possible extensions of the project.
Examples of less good practice
Example 1 Sophisticated mathematics done poorly
Example 2 Poor scales
Example 3 Inaccurate data
Example 4 Unclear data
Example 5 Poor data collection
Example 6 Poor mathematical understanding
Example 7 Inappropriate mathematics
Example 8 No plan given
Example 9 Poor discussion of validity
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Examples of good practice
Example 1
The student has produced a written plan that is clearly set out, and explains in detail what the student intends to do.
Examples of student work
34 © International Baccalaureate Organization 2005
Example 1 (continued)
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Example 2The student has produced a plan that is set out as a series of steps to follow.
Examples of student work
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Example 2 (continued)
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Example 3The student has thoroughly discussed the results obtained.
Examples of student work
38 © International Baccalaureate Organization 2005
Example 3 (continued)
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Example 3 (continued)
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Example 4
The student has discussed the results obtained and has attempted to discuss the validity of the processes used.
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Example 4 (continued)
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Example 5The student has discussed possible extensions of the project.
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Examples of less good practice
Example 1Sophisticated mathematics done poorly
Example 1aThe student lacks understanding of “r”, the correlation coefficient. The value of “r” for the data below is -0.029. This implies no correlation and, therefore, it is not valid to use the calculated linear regression line to extrapolate and predict results for the next season.
Examples of student work
44 © International Baccalaureate Organization 2005
Example 1bThe expected values do not add up to 100. The range of values taken for x is too small.
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Example 2Poor scales
Example 2aThe scales on the y-axis are set out in calculator notation. There is nothing on the x-axis at all.
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46 © International Baccalaureate Organization 2005
Example 2bThese hand-drawn scales on blank paper are not very accurate.
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Example 3Inaccurate data
The data cannot be read accurately from the bar graph.
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48 © International Baccalaureate Organization 2005
Example 4Unclear data
The data is presented on a black background.
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Example 5Poor data collection
Example 5aThe quantity of data is adequate, the organization of it, as presented in this form, is not appropriate for analysis.
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50 © International Baccalaureate Organization 2005
Example 5bThe data here is lacking both in quality and quantity.
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Example 6Poor mathematical understanding
The student shows no real understanding of percentages.
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Example 7Inappropriate mathematics
Example 7aThe student does not understand the regression used. It is difficult to understand why the student has attempted to fit a quadratic regression equation to the data. No explanation of the techniques used has been provided, and no attempt has been made to interpret the results within the context of the task. It is doubtful if the student has any real understanding of the significance or value of the results shown.
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Example 7bLine graphs are used to represent discrete data.
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Example 8No plan given
The task is stated but is vague, and no plan is described.
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Example 9Poor discussion of validity
This is an example of the type of discussion on validity that is not recommended.
