Next: A2 Evidence from national mathematics competitions:
Up: APPENDIX A
Previous: APPENDIX A
The first example concerns a test given to 55 incoming honours
mathematics students at one English university in October 1994. The
students' mathematics A-level grades were: A 12, B 13, C 16, D 6,
other qualification 8. We choose some of the questions to indicate
particular concerns, but other examples could also have been
used. After the statement of each question appears the percentage of
students who answered the question correctly.
- 1.
- Solve the equation
. (75%)
- 2.
- Factorise the following expressions as far as possible:
- (a)
-
(78%)
- (b)
-
(73%)
[Note: Of the 6 students who managed to factorise neither of
these quadratics, 3 had achieved a Grade B at A-level.]
- 3.
- Calculate the areas shaded in the diagrams, leaving your answer in
terms of
where appropriate.
- (a)
-
(78%)
- (b)
-
(84%)
- (c)
-
(5%)
[Note: the lack of success on the third part of this question
underlines the dangers of a system which
- (a)
- sets questions which lead the candidate, step by step and
- (b)
- rewards superficial knowledge of those items listed in the
`levels' of the National Curriculum.
This question needs no mathematics beyond `level 7'; but it asks
students to use and apply this knowledge in a mathematical way. For
they must draw together knowledge from different areas and undertake,
without instruction, the extra steps required.]
- 4.
- In the diagram below:
- (a)
- Express h in terms of b and
. (91%)
- (b)
- Express h in terms of c and
. (91%)
- (c)
- Express h in terms of a,
and
. (18%)
[Note: Again, there is a substantial drop in success when the
question requires additional, unsignalled steps.]
Next: A2 Evidence from national mathematics competitions:
Up: APPENDIX A
Previous: APPENDIX A
Tackling the mathematics problem
LMS/IMA/RSS
October 1995