Ricardo Teixeira, standing right, a UHV assistant professor of mathematics, shows fourth- and fifth-grade Dudley Elementary School students attending the school’s Sept. 20 Math and Magic Club how to do a card trick using mathematics to predict which card is pulled from the deck. Teixeira is spending the school year teaching the students about the mathematics used in magic tricks and helping them prepare for the University Interscholastic League mathematics competition in the spring.