Hello! I'm new here. I'll be 16 on Feb-14 and right now I am taking an A+ class at my highschool. We're using this huge 1000+ page book by marcraft. We finished all the Hardware chapters and were almost done with the OS parts. My teacher has vouchers so we can take the test for free and he said he will even give us a second one if we fail by only a little. but I would just like to know how long is long enough to prepare for this test? Everyday I use marcraft's cd and do a practice test which is 70 questions. The questions on that are considerably harder the ones I have tried on ****.com and other places. On the **** site I do easily 80-95+% but when I do the cd test I am in the range of high 50's and around 60's. My teacher said he will be giving out vouchers pretty soon and I am nervous.
my troubles are cable type connections and like "What type of cable is most likely in use with RJ-45 connectors to attach computers to the network?"
Also I have trouble with printers mostly lasers... When I get questions like why is test comming out only half way (its cut off) or stuff and I see chpices like ribbon cable, toner stuff, etc I get really confused!
I donno those are just some examples! I am answering a packet of 300+ questions my teacher made up for me and using that at home to practice when I am bored. I also do some online (like here and ****) and at school the CD and the tests we have.
So how can I memorize these tricky answers?

Also we do labs at school based ont he marcraft lab book. So I have first hand experience and my teache rknows what he's doing being cetified in 5 areas and working witht he school network etc. Am I doing enough?
EDIT: Is there a reason amazon is replacing the word fre-e-comp-tia?