For sure, but it's not like all other projects are being auto-rejected, I think YC will always be interested in forward-looking educational proposals. One other thing to bear in mind that educational is a multi-generational undertaking; every little helps, but short-term thinking brings you cheap PCs in schools one year and iPads the next. Long-term thinking requires a vision going out 25 years into the future and a plan to respond to and either incorporate or resist outside criticism, depending on how well founded it is.