I have not found textbooks for Hebrew speakers. I believe you can create visual aids and lesson plans for your topics. One simple way is to help the student ask questions, and demonstrate the different answer you get when you change the verb form of the be verb.
Where are you from? What do you do? What are you doing? Materials for preposition are easy to make. All you need is an object and a box. I have handled above, below, in, on, under, and beside in this manner. One funny example was "The rabbit is in the toilet" involved a toy rabbit doll and a paper toilet.
You know much more than I do about LD. Sorry, I cannot help you there.