<p>If you signed up to take one subject, can you take a different on at the test center? For example, if I signed up to take Chemistry, but now I want to take Math instead, can I do that?</p>
<p>Yeah, you don’t actually have to commit to taking a particular test til you sit down and take it.</p>
<p>Really? There is no fee?</p>
<p>You can do that, they just give you a large booklet that contains all the subject tests. (that are offered that month besides language w/ listening)</p>
<p>You will only be charged if you add another test.
You can sign up for Physics and Chemistry and switch to taking Math I, Math II, and US History if you want.</p>