Mathematics B Online Marker Training

The Online Marker Training provides information on marker roles and responsibilities, features of assessment, differences between current internal assessments and external assessments in this trial. Subject-specific tasks are a key aspect of the online training and must be completed. It should take about 20 minutes and give you an understanding of what being a marker involves.

Course materials

Introduction

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Key dates

Face-to-face marker training

7 June (9am-4pm)

Marking

8-13 June 

If required, the marking operation may be extended.

Additional materials

Information Statement for Schools

https://www.qcaa.qld.edu.au/memos/16/072-16.pdf

Supplementary materials

Sent out with the Online Marker Training email.

Example 1

This example is taken from the sample instrument, paper 2, question 1.

A model response is available in the Supplementary materials.


The focus is on the Knowledge and Procedures criterion, KAP.

Correct answers

Explanation

In this response, the value of a is stated as 17.01. Therefore, the first statement is false.

Pythagoras’ theorem was used to calculate the perpendicular height, h, and then the sine of angle b. These are appropriate procedures that could be used to determine b. Therefore, the second statement is true.

The value of a, which is 17.01, has not been correctly carried through the response to determine the value of b. In particular, substitution errors were made in the use of Pythagoras’ theorem, indicated in the blue box. Also, a calculation error was made during the use of Pythagoras’ theorem, indicated in the red box. Therefore, the third statement is false.

Question 1

  • 12.36 has been stated as the value of 𝑎.
  • Mathematical rules and/or procedures have been selected that could enable 𝑏 to be determined. (numerical errors may be present)
  • The value 𝑏 is the result of the correct application of mathematical procedures.

This question is taken from the sample instrument, paper 2, question 1.

The focus is on the Knowledge and Procedures criterion, KAP.

Make judgments on the following statements:

Question 1 answer

This question is taken from the sample instrument, paper 2, question 1.

The focus is on the Knowledge and Procedures criterion, KAP.

Correct answers

Explanation

12.36 is the stated value of a. Therefore, the first statement is true.

The required triangle height shown as a question mark in the blue box cannot be determined, because there are two unknowns. Therefore, the procedure selected could not be used to determine the value of b. Similarly the procedure shown in the red box also contains multiple unknowns. Therefore, the selected procedures could not be used to determine b. The second statement is false.

The value of b is stated as 30 degrees. This is not the correct application of the selected procedures. The numerical answer for b cannot be supported by the procedures shown. The third statement is false.

Example 2

This example is taken from the sample instrument, paper 1, question 8.

A model response is available in the Supplementary materials.


The focus is on the Communication and Justification criterion, CAJ. Note that student answers do not need to be correct when making judgments in CAJ.

Correct answers

Explanation

There has been no indication of where the median value would be located in the stem-and-leaf plot. The first statement is false. 

Calculations have been used to explain how x was obtained, even though the selected method and final answer are incorrect. Therefore, the second statement is true. 

Question 2

  • Reasoning has been used to explain where the median value is located in the stem-and-leaf plot.
  • Calculations have been used to explain the value of 𝑥, or the age.

This question is taken from the sample instrument, paper 1, question 8.

The focus is on the Communication and Justification criterion, CAJ. Note that student answers do not need to be correct when making judgments in CAJ.

Make judgments on the following statements:

Question 2 answer

This question is taken from the sample instrument, paper 1, question 8.

The focus is on the Communication and Justification criterion, CAJ. Note that student answers do not need to be correct when making judgments in CAJ.

Correct answers

Explanation

The location of the median value has been explained, even though the reasoning and conclusion are incorrect. Therefore, the first statement is true.

Calculations have not been provided to explain how the age was obtained. Therefore, the second statement is false. 

Example 3

This example is taken from the sample instrument, paper 2, question 6.

A model response is available in the Supplementary materials.


The focus is on the Modelling and Problem Solving criterion, MAP.

Correct answer

Explanation

Question 3

  • The height value √𝟑 or 1.73 has been stated.
  • The cosine rule has been correctly stated.
  • Appropriate values have been substituted into a chosen rule and used correctly.
  • The value of cos 𝜃 been stated as 1/3 or 0.33.
  • The value of angle 𝜃 has been stated as 70.53°, allowing for follow-through error.

This question is taken from the sample instrument, paper 2, question 6.

The focus is on the Modelling and Problem Solving criterion, MAP.

Make judgments on the following statements:

Question 3 answer

This question is taken from the sample instrument, paper 2, question 6.

The focus is on the Modelling and Problem Solving criterion, MAP.

Correct answers

Explanation

Thank you

Thank you for completing the Online Marker Training.

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