As students attempted to fix the image of the snake to have it show correctly in front of the bars with the text also on the right ‘layer’, I found a few students just were not understanding the issues in the program.
So, I used a visual tool to demonstrate the layering. With simple note card layering IRL, we placed each object on a background. Then we could discuss the order we wanted the objects to be in. This visual manipulative seemed to really help students pick up on the concept of what was going on in the code.
(additional note, students need to also understand that the var and setAnimation blocks do not draw the sprite - this is an additional point of confusion.)
