Are there any offers or discount for students flying to the US for education?
There are actually sites dedicated to discounts for student travel:
I could not find the major US Carriers advertising this on their websites but it is possible that they might offer such discounts if called for reservation directly.
KLM for example doesn't offer any student fares.
I have used Student Universe several times in the past. I have used STA Travels once as well (for a EURail Pass). The only restriction for both is that you must provide your school ID to them in order to hold a valid account.
As long as you can do that, they have some pretty good deals, especially at the last minute. Beware that sometimes Student Universe will show you tickets which you cannot book if you click on them stating that the "offer" is not available anymore. But I can vouch that they are extremely trustworthy will excellent customer support. STA travels offers discounts for group tickets as well!
Also, I do not work for either of these companies.