Teacher greets students before class with a special handshake

A teacher has created a special way to greet his students every morning - he meets every child at the door of his classroom with a unique handshake.

Sergio Spencer is a third grade teacher at Spring Hill Elementary School in Jeffersonville, Indiana. So far he has memorized over 200 different combinations. Spencer says it's a way for him to form a positive relationship with his students. How does he remember all of the handshakes? He says it's just an odd talent of his.