This Photoshop assignment can be used for all levels of graphic design students. It includes directions, a sample, sayings to use and a rubric.
My students always enjoyed this type of freeform assignment. The only requirement is using Photoshop.
I did let students use their own sayings, if they asked. Many had heard a favorite from a grandmother or grandfather. As long as they were appropriate, I allowed it. My favorite was "twinkle toes like the river flows." I still have no idea where it comes from but basically it means 'light on your feet.' A student's beloved late grandmother used this to describe her ballet dancing.