They work, but the extent of the effects depends on the person. Placebo effect is also possible. Just taking them isn't enough. If your grades are regularly poor because you don't study properly, you'll have to fix your study habits before the drugs can properly help you.
I really hope things don't turn out well for you guys and China gets mad. Then there will be a war which will lead to the events of... ...Fallout :hai:
$350 MSI 790FX-GD70 motherboard AMD Phenom II x4 955 3.2 GHz ATI Radeon HD 4890 G-Skill 4 GB DDR3 2000 MHz Coolermaster HAF 922 case Corsair CX430 power supply Western Digital Caviar Green 500 GB and 1 TB and some other random stuff like fans, disc drives, and network cards