Teachers,
Here are various resources that have been accumulated at workshops, meetings, and from other educators that might be useful for your classroom.
3. Math Apps: http://blogs.kqed.org/mindshift/2013/08/5-math-apps-for-middle-school-students/
5. PBLU - Making Projects Click http://www.pblu.org/
6. The PBL Project - Focused on Making Problem Based Learning a part of regular classroom instruction. http://www.pblproject.com
7. Novel Ideas - http://www.mrsoshouse.com/pbl/pblin.html
8. Information about PBLs - http://www.edutopia.org/project-based-learning-guide-activities
9. Collaboration Project Ideas: https://www.cultofpedagogy.com/collaboration-projects/