https://computationalthinkingcourse.withgoogle.com/course?use_last_location=true
https://scratch.mit.edu/projects/39878482/
http://scratched.gse.harvard.edu/resources/animation-lesson-outline
https://scratch.mit.edu/projects/586418/
http://scratched.gse.harvard.edu/resources/creating-scratch-worlds-are-examples-stem-learning