Help on highschool ignment..Ritalin and adderall?

Ok so i have a report on study drugs(ritalin and adderall) for my English 2 cl in highschool..im having trouble finding information on it(unlike my other clmates who are researching club drugs, date drugs, etc..)..i need to know sum differences between the two..also what enhances the drugs??..for example:OJ enhances ecstasy..also, are aderrall and ritalin the only known study drugs?? please help! :)