Use wndr3700 as router for small school?

I have been tasked by a friend who runs a small independent school to help them with some network upgrades. They have less than 40 devices total, between computers, laptops, iPads, and some other miscellaneous stuff like wireless printers.

I'm wondering if I can use a router like the Netgear WNDR3700 or a similar model to serve as their entry point into their network after the cable modem which currently provides their internet connection?

I'm going to be setting them up with OpenDNS and a switch after the router that will feed into several APs located at different spots around the building but I'm not yet certain about the router choice. I would love any experience and info you can share to help me make the best decision as this isn't just an office full of workers. This is a school, so I really want to hit the nail on the head this summer so their network is stable and fast for the school year.

Just a couple notes:

The APs will be run directly from the switch. No intermediate mini-switches or routers in-between the main switch and the APs.
Everything in the network that can be will be on PoE.
They do use some iPads in the classrooms so I'm planning on doubling up the APs in those rooms for the bandwidth support and stability of the network, one being 2.4 and one being 5.0/2.4 GHz.

Thanks!