Crowdfunding Comparison

Funding Models:

All Or Nothing vs Keep What You Raise

Crowdfunding Platforms - Education Specific:

5 Crowdfunding Sites Specific to Education

Edutopia - Raise Money For Your School With Crowdfunding (comparison on pp. 6-8)

Crowdfunding Platforms - General:

7 Crowdfunding Platforms Compared 

Wikipedia: Comparison of crowdfunding services