https://www.core77.com/
Design Squad
https://pbskids.org/designsquad/
Teach Engineering
https://www.teachengineering.org/
IDEO/ Design Kit https://www.ideo.com/
https://www.designkit.org/
Maker Space Playbook
https://makered.org/wp-content/uploads/2014/09/Makerspace-Playbook-Feb-2013.pdf
MakeZine
https://makezine.com/
Instructables
https://www.instructables.com/
Try Engineering
https://tryengineering.org/