This website has National Standard aligned lesson plans, courses art teachers (and others) can take for credit or professional development, and online magazine, videos, and art conferences.  
They cover art: advocacy, assessment, classroom management, creativity, technology, curriculum, differentiation, Instructional strategies, media, techniques, methods, approaches, organization, philosophies, and professional development.

This issue of the free online magazine, Beyond Penguins and Polar Bears, highlights resources that help elementary teachers learn about climate change and teach their students important foundational concepts.

Infographic to be used by teachers in indentifying instructional routines and types of tasks to support  students' development of mathematical modeling skills.