Well, this isn't really the drug connection center and I would be very careful about meeting somebody over the internet that you have no prior history with to purchase or sell drugs.
Go to a doctor and see if you can get them legitimately, psychiatrists love to give kids uppers.
Also, Dexedrine is better since it is just dextroamphetamine which is more potent. Adderal is a mix of the d and l isomers of amphetamine.