Reggie explains that while the letter "x" usually makes the "ks" sound, it also sometimes makes the "z" sound. He then gives a tip to help his audience figure out what sound the "x" is makes when: if the "x" comes in the middle or at the end of a word, it makes the "ks" sound, but if it comes at the very beginning of a word, it makes the "z" sound. This resource teaches reading, reading strategies, spelling, phonics, and decoding.