TurboSquid - TurboSquid offers 3D models for professionals.
PowerSchool - PowerSchool provides a K-12 education technology platform for operations, classroom, student growth, and family engagement.
STLFinder - The 3d models search engine.
Clever - syncing between education applications for K-12 schools
3DOcean - 3D Models & Accessories From $1 for 3D Models, Textures, Materials & Shaders, 2D Concepts...
Claroline - Claroline is a collaborative eLearning and eWorking platform.