"Personal Best" means the best YOU can do. It is not about competing with someone else. And, it is not about "I'm smarter than you are, haha!"
These three "Math-letes" have been working to improve their personal speed on their Rubik's Cube. They are all hoping/ trying to break the 1 minute mark! That takes a LOT of persistence and a LOT of self-discipline! Way to go!!
