Sometimes you need to go to extra lengths to learn and appreciate a subject.
I have a deep love for trigonometry and I wanted something to draw interest to the unit circle. My friend and I collaborated on creating this wheel which spins because it is actually a wooden lazy Susan. When people see it, they are usually intrigued by the colors and numbers first. The interest gives me the opportunity to talk about the relationship between degrees and radians, and the pattern for memorizing the circle.
Every time you are exposed to information, it makes it easier to recall and apply the concept when needed. Be creative!