Oh no! Not again! (or how I built a time machine to save history) (or at least my history grade) - Santat, Dan 1975- (Disney / Hyperion, 2012)
When she does not get a perfect score on her history test, a young girl builds a time machine to remedy the situation.
Keywords: Time travel -- Fiction; Cave paintings -- Fiction; Cave dwellers -- Fiction; Humorous stories; Kinderbuch