Below is the link to the sight-reading exercise mp3s. There are 12 one-measure exercises. Mr. Laguana will choose 5 for you to sing. Please study each one as you don’t know which ones he may have you perform!
https://www.dropbox.com/sh/z01ev8o71wi3b4t/AAC38VEi-ScUBRHleg7qeMQha?dl=0
http://jklaguana.aurorak12.org/wp-content/uploads/sites/149/2015/08/Music-Reading.pdf