What is Esp

Achievement tests
Achievement test is the least problematic, because it is usually internal to the course and does not have to conform to external influences. It is should reflect the nature and content of the course itself (Alderson and Hughes, 1981). This kind of test, usually ESP teacher is most likely to have to construct. In constructing a good ESP achievement test you should follow the basic principles as you would for constructing any test. For example:
a. Test what you can assume the learners have learn, but not necessarily the same as what you have taught.
b. The test should test what you actually want to test.
c. Avoid bias in the test.