ExtendED Notes has put together this comprehensive Pinterest Board of STEAM – Science, Technology, Engineering, Arts, and Math – Activities for K-8.
ArtsEdge is The Kennedy Center’s free digital resource for teaching and learning in, through and about the arts.
PBS LearningMedia is a free resource for in-school and out-of-school time educators to access an abundance of K-12 activities, searchable by subject and by grade level.
Tinkerlab is a creativity + kids blog written by an arts educator and mother. It is updated at least 3 times each week with creativity-boosters, art projects, science experiments, tinkering activities, and any topic related to children and creativity.