TurtleArt lets you make images with your computer. The Turtle follows a sequence of commands. You specify the sequence by snapping together puzzle like blocks. The blocks can tell the turtle to draw lines and arcs, draw in different colors, go to a specific place on the screen, etc. It was designed to be easy enough for children and yet powerful enough for people of all ages. TurtleArt is focused on making images while allowing you to explore geometry and programming.
CMSCE, at Rutgers University, provides professional development for K-12 educators to enhance science, technology, engineering and mathematics (STEM) teaching and learning in the classroom.
The activities were a great way for me to visualize what I need to do. Also there were instances when we were able to go through an activity, then choose an topic & design an activity that followed the guidelines.