I have been teaching ESL to Spanish speaking adults for about 25 years. I focus on pronunciation from the first class for beginners and usually.
Literacy - High School to Adult Illustrated LINC/Life Skill Theme Units Finally a phonics book specifically for adult and young adult ESL students. This book.
There's currently a buzz around the inclusion of phonics in the Entry Levels of the English Functional Skills qualification. I wrote this post when the original.
Phonics is sometimes a controversial subject among ESL teachers. I know my linguistics program taught that phonics was not a good choice for ESL students.