That means the Deaf kids need the same quality stuff, in SW, that hearing kids get in English, etc. Sure, you need basic sentence structures, but you need relatives and conditionals, too. ASL uses all this all some form of grammatical equivalent. Produce these, and read them to kids everyday, and they will be truly motivated to want to read. Combine this with really basic stuff for beginner readers to learn to read and write.
Flash cards have their place, but children learn to read by recognizing whole words in context.
But, phonetics alone are not enough. Also, respectfully, the notion that Deaf people's judgment in producing SW stories is inherently superior to that of hearing people whose culture revolves around putting spoken thoughts to pen is crap. But, then I'll bet you no one has produced as much literature in SW as I have. Alas, it' s all in the wrong sign language for y'all in the States. I have been at it with a team for two years now, and that's why we have as much as we do.