Amazon’s global initiative to provide students and educators with the resources needed to accelerate cloud-related learning and help prepare students for a cloud-enabled workplace.
An AWS Account, if you don't have one then go here http://aws.amazon.com/getting-started/ .
Pick one of the three available options :
Educational Institutions: Should be applied by Harvard HUIT.
Educators: A professor, TA or a teacher (I will use this category as an example).
Credit numbers and codes are random and not real in this documentation