To help reinforce the 'er', 'ir', and 'ur' sounds, I have each child cut out paper dolls. They are holding hands and are labeled the 'Er Sisters.' They color them and put the sound on each doll's shirt. They then paste them on a sheet of paper and under each doll write words using the corresponding sounds. Example: under 'er' they write teacher, flower, nerd etc. I also do this with the 'oi' and 'oy.' I call them the 'Oy' Boys. I have found the students remember the sounds after these activities and often refer to the 'er sisters' and the 'oy boys.'