How to create shapes using the commands: ellipse(), rect(), point(), line(), triangle(), and beginShape()
How to add color to shapes using the commands: fill(), stroke(), strokeWeight(), noFill(), noStroke()
How to fix problems in your code ("debug" and undo)
How to randomize the size, color, and position of shapes using the command: random()
How numbers represent colors (how to use color models)
How numbers represent positions on screen (how to use the coordinate grid)
How to respond to screen clicks by using function mousePressed() 
How to use the built-in variables "mouseX" and "mouseY" to make shapes follow the on-screen pointer
How to create variables and change their values to move shapes, change their speed/size/color, keep track of score and state
How to slide shapes across the screen by using the command: translate()
How to spin the screen by using the command: rotate()
How to use the "if" command to make choices that produce different behaviors while animations are running 
How to use commands that repeat actions ("loops") like for() and while()

15 years of experience teaching JavaScript, Python, Scratch, web development, robotics, and artbotics to learners from 8 - 15 years old in private, public, and after-school settings. Two masters degrees in education – from Harvard Graduate School of Education with a focus on technology and from Lesley University in mathematics education. And, most of all, great love, patience, and respect for the many different ways that people learn and the different gifts they each bring to the classroom!