Does your Block area promote 21st century skills? - A check list for teachers:

http://http://www.naeyc.org/tyc/article/block-center-checklist#.VucVMrhUDXM.email

Block Play Development:

Stages of Block Play

Children's stories that support block play:

Must have books for your Block Area

Block Play article:

Rigorous Block Play

Block Play lesson plan ideas:

http://backtoblocks.com/creative-lesson-plans-using-building-blocks

25 block play ideas:

http://http://fun-a-day.com/wooden-block-activities-for-preschoolers/

Early STEM learning - Building Structures:

http://http://www.k12.wa.us/EarlyLearning/pubdocs/Unit2BuildingStructuresandExploringShapes.pdf