Thus in most beginning language classes for Spanish, French, German, and other languages with alphabets similar to English, you teach the sounds represented by each of the letters, and then assume that the student will be able to read. One typically spends little time in actually teaching reading, except perhaps to develop vocabulary and comprehension skills.
For the non-literate ESL adult learner, on the other hand, you must begin with basic word recognition skills such as sight words, contextual skills and word analyses skills. You should then teach them the alphabet and sound symbol relationships. Finally you must teach them to form the letters and to write words. The development of these basic skills requires much more time and practice for the non-literate learner.