SRL & MWm, you've beaten me to it. Nothing left for me to say except to heartily endorse what you posted. Hyperlexia - yep. Autism, possibly Aspeger's - yep. Pervasive Developmental Disorder (PDD) questionnaire on childbrain - yep. Do a printout, even if he scores as normal, the printout comes in handy as a memory jogger if noting else, as wel las a snapshot of your concerns at the moment.
Explosive Child - yep.
neuropsychologist assessment - yep.
All these a priority. As for dropping the IEP - crazy. He sounds like he could fall into the category of gifted-learning disabled.
One thing I will add - get a speech/language pathologist to assess the boy NOW. Try to get a good one, someone who will look into the sub-scores and not simply say, "he scores as normal." You want to know whether the scores are high normal or low normal, because even within normal rage, a wide GAP can indicate serious problems now or in the future, due to frustration.
Try to visualise what it's like in the head of a highly intelligent child who simply can't understand why the world isn't following any rules consistently, that he can understand. He also is having difficulty explaining his frustrations in time to stop himself from simply raging. And raging doesn't solve anything either, it only upsets him more and makes everything more confusing. It makes people angry with him, and he's already angry with himself for seeming to be so DUMB! And he's not dumb. Clearly not.
Hyperlexia isn't just early reading. It's where the early reading is also linked to poor understanding of what he reads, where he reads way beyond his ability to comprehend fully.
Example - difficult child 3 could pick up a newspaper and read it aloud, fluently and with expression. Between two and three. He knew his alphabet and numbers to three digits, before 2 years old. But he was non-verbal, apart fomr what he could read. Freaky. He could also read sheet music and play it on the piano.
When assessed by a speech/language pathologist at two and a half, we were told his language levels were at least a year behind. However, he could quote huge chunks of text from movies (which he would watch with subtitles on - at 15 he still prefers subtitles to be on). He could memorise songs on the radio which, considering he was memorising strings of sounds and not word (to him at the time) was an astonishing memory feat.
A brain like this needs help to learn how to work properly. It needs different handlnig, different learning methods but can be a joy to behold as it begins to discover the world.
Marg