Waze POI searches essentially retrieve address coordinates from Bing. If you search for either Caryn Elementary, Rancho Cucamonga, CA or Lightfoot Elementary, Rancho Cucamonga, CA on Bing Maps you get a location at Amethyst Ave and Base Line Rd. This appears to be the problem to me. The locations of the schools will need to updated with Bing.
Regional Coordinator: Mid-Altantic, US
Verizon, Droid Razr Maxx HD, Android 4.1.2, Waze 184.108.40.206