From the very start of the course, there is an emphasis upon economic modelling. Thus the equation of a line might be taught in the context of the effect of changes in price upon demand for a good, or the consumption function of an economy. As lectures progress, applications become more sophisticated and complete, so that by the end of the lecture series, we consider standard problems in the theory of choice and analyse the standard IS-LM model. The WebTests are a series of fourteen problem sets that examine students' knowledge of particular economic applications of mathematics. Tests are available online, and each question contains a number of random parameters, determined separately in each realisation of the test being used - generally sufficient so that no matter how many times the student generates a test, they will not obtain the same question twice.
Students can try each test as often as they wish.
Since each realisation of the test is different, and questions are quite sophisticated, students tend to learn techniques for solving types of problem, rather than specific questions.