Both Elvis and his classmates date this as the beginning of his rise to fame. Elvis later said, 'It was amazing how popular I became after that', referring to the above performance. It was a seminal moment. Like a scene out of one of his future movies, Elvis set aside his own shy personality in favour of a popular and animated persona, and the peculiar-looking young man began to attract the attention of his peers like moths to a flame.
source: Elvis Matters