Since I am also certified as a teacher of the deaf/hearing impaired, this question was brought up to me at a recent conference. Is it confusing the children to be making up gestures that are not true ASL? In my opinion, absolutely not! When teaching hearing students, we are not teaching them a new language to communicate with the rest of their lives. We are simply providing them a visual, thus utilizing their visual cortex. These are tools to help them remember new information.
If you are teaching a classroom of deaf students, this model would look different. You would have to adapt it to meet your needs. Perhaps you would construct your own pictures using ASL. If you had one student in your class that was deaf, chances are that student would have an interpreter that could wor with you in adapting for that student's needs. If you have a hearing impaired student utilizing amplification, chances are they do not use ASL and would not become confuse with the power pic gestures.
I haven't seen any posts yet on this topic, but I hope I helped any one out there who may have had this question. I was originally drawn into ASL because I had seen deaf children acquire language faster through sign, than I did hearing children through spoken language. The visual aspect made so much sense to me.
Rebecca Crooks
WBT Intern 2011-12