I need a bit of help..any suggestions?? (Hannover)

Hey everyone, I currently live in Germany (have been for 3 years), and I have many influential friends who have or are attending some great Ivy League schools in the US, including Harvard. Anyways, I´ve talked to allot of the Ivy leagues and after a year of gathering my information, I was notified by a number of ivy league alumi that I would be a very strong candidate. The barrier is...I need to take some very strong science classes here in germany before I submit my application. Does anyone know of a Biology, Chemistry.etc course designed for English speakers here in Hannover that I could take? Or any other science , math or related courses?