<p>Make sure you get your hands on as many past papers you can, especially with their markschemes. You really need to know how the questions are set (sometimes some are repeated, too) and, more importantly, how to answer correctly: there is a fine line between giving a correct answer and answering correctly. The markschemes will prove to be very helpful.</p>
<p>As an example, I took Unit 1 Biology (Edexcel was the board) and got a C last summer. I retook it a few months ago and got a high A without really revising. All I did was simply read the markschemes to get an idea what kind of answers the markers were looking for. I recommend you do the same.</p>
<p>As for subjects, I did/am doing Math (3 pure and 3 mech modules), Further Math (3 pure and 3 mech modules), Biology, Physics and Arabic.</p>
<p>The math is pretty easy. Just make sure you know how to answer according to the markschemes, because missing out some steps you would think are obvious will lose you marks. You should manage doing 6 pure modules just fine, but if you do run into some trouble in one of the modules, you could always pick up a low-level applied math module and go for an A-level in Math instead of Pure Math. Edexcel is the ‘popular’ board for math.</p>
<p>Biology on the other hand is rather ‘tedious’. My board is Edexcel, and I feel that their specification is messed up and incoherent, plus their tests are horrible. It seems, at least to me, that a large portion of their questions (especially ones related to ecology and other similar topics) are very vague and require little biological preperation. You can still do well on the tests if you practice with past papers and markschemes. (It also helps if you stay away from Edexcel for Biology. :))</p>
<p>There’s nothing odd or special about A-level Physics, so I can’t comment much.</p>
<p>Finally, tests are different. There are two things you should know: UMS and test marks. For example, all Edexcel math tests are out of 75, but when you get your certificate they’ll be out of 100 (the UMS). The conversion to UMS process depends on how other students did on the tests, i.e. it’s graded on a curve. The curve can help or hurt you. If you get, say, a 80% on a test you might get a 78% UMS or a 81% UMS – it depends on the curve. Naturally, this is good when the test is hard, but this is almost always bad in regards to the lower-level tests, especially in math, as most people score high. So in P1, for example, you can get 73/75 on the test (you never know your test mark, btw) but get a 94/100 UMS. An 80% UMS is always an A. Also not all UMS are out 100, some are out of 90 or 120.</p>
<p>Sorry for the long post and any grammatical or spelling mistakes.</p>
<p>Good luck. :)</p>