A big part of education startup failure is conflict of interest among all the parties. For an individual teacher to adopt a new technology is not super difficult; you just have to solve a real pain point, or show that your tool can help them actually teach students. The problem here is that teachers have no money. Not only are they rarely given discretionary money to use for the classroom, but they're severely underpaid professionals who are notorious for already spending lots of personal money on their students. No way to monetize this group effectively.

The second layer is District/State boards of education. The problem here is educating (ironic) these former educators on what the classroom needs. Often, these people believe that the technologies available the last time they were in the classroom are sufficient for teachers to do their work. Additionally, teachers have very little pull in this group, as most are elected/appointed officials. This group actually has considerable influence money-wise, as there is a lot of money earmarked for technological purposes. But by and large they are not aware of technologies that are not prefaced by Microsoft, Dell, or IBM.

The ancillary of the second layer is the district/state IT department. Let's just say that the best people in IT don't wind up here, because the pay and work environment are horrible. To save costs, you're constantly looking into open source solutions. Likely, these people will believe your excellent product can be easily replaced by a Wordpress install with a bunch of plugins. Maybe it's really because they just want to prove they can program like any professional (hint, they cannot). So, no support from IT for you.

The final layer is at the federal level, people who make policies. Your best bet here is to have a 20-year Senator who will vouch for your product, lobby for you with all the other old people involved in setting educational policy. Here's a hint though - people think Common Core is a radical change but it's half a century in the making and really doesn't change what anybody was already doing except for adding more testing. Long story short, if your product isn't another way to test students in a standardized manner, you'll get no traction at this level.

So, good luck!