1) In my header you see that there is a set of algebraic equations in the left. My text is Green and Yellow. I chose those pictures because I like learning math in school.
2) Three design choices I made that make my header successful are Focal Point: You can see the math at the left, Space: I opened up some space in the bottom left corner, and Contrast: The lighter yellow can be seen easier than the dark green.
3) The best part of my design is the open space because I can add a lot of things there. 4) Some things I can change to make my design better are add a few things in the bottom left corner.