I just got a 3rd grade student who is very low cognitively. She only recognizes 60% of the alphabet and knows only 40% of her sounds. She forgets information very quickly. Can I teach letters, sounds along with sight words? I need to start her with the pre-primer list. Would Edmark Level 1 be appropriate for her to learn sight words? I've never had a 3rd grader this low so any help is appreciated!