And its really a waste of LSD. 1/4 hit will be very un-psychedelic, it'll just make you feel and act "off kilter" in a mostly unpleasant way.
Though speed can combine with lsd quite nicely, boosting euphoria and visuals, especially the nice clean smooth time-release amphetamine salts/isomers that are in Adderall.
Its just a waste and a risk to do it at school. If you want to try that combo, actually it might be nice, but dont risk being clocked for acting fucked up at school (which you may not be able to help even on only 1/4 hit)... and DONT WASTE THE LSD!! Save it and try a whole hit, or 1/2 if splitting with buddy, with the adderall, right AFTER school, or even better at the beginning of the weekend. You will enjoy the whole thing WAY WAY more, both for doing more of a proper dose, and especially for NOT BEING IN STUPID BORING FUCKED UP SCHOOL while tripping! Save it for when/where you can really have FUN, man!