Hey plam, funny that you mention this — I'm currently building something slightly similar (platform-wise).

Background: I help run CoderDojo NYC and we're always looking for technical volunteers to help at our events. After speaking with a few other teach-kids-to-code organizations, we realized that they had the same problem.

Our solution: https://github.com/carlsednaoui/nycio (it's a work in progress). It will look like this: http://www.nyc.io/ Everything is open-sourced — we're also looking for more contributors if anybody wants to help.

How to get volunteers? We're partnering up with NYTM to build the tech volunteer pool and help them connect with organizations. You could imagine doing the same on your end but with different schools and organizations (happy to send intros where relevant).

Let me know what you think. If you want to chat more we can connect via email <username>@gmail...com