Coppell High School juniors Deianna Madlambayan rotates a tennis ball and a string while conducting an experiment in the pit during Dayna Bryant's AP GT Physics class on Tuesday, while juniors Jarrett Taylor and Chase Price videotape and time Madlambayan. “We’re figuring out the speed it takes for the ball to fly off the string using physics” said Madlambayan. Photo by Ayoung Jo