Aside from an eval (yay!)... have you tried Charlotte Mason style narrating for reading comp?
((We do a mix of apx 40/40/20 Charlotte Mason, Montessori, and Whatever Works in our schooling. Kiddo is a very kinesthetic / spatial learner with a large visual aspect -he has to translate everything into something he can see in his mind- which can get very challenging in a classroom setting. LOL, like yours, my 8yo is a raging extrovert / super social. If the lesson doesn't have his rapt attention he's FAR more interested in all the people around him -don't know if that's true of yours- than on trying to "translate" what the teacher is saying/presenting into a way he "gets". He *can*, but only if he is in love with the material AND has a visual reference for it or has gotten pretty hands on with it in the past. Any/all of which is a lot to ask of an 7/8/9yo))
Here's a clip from my favorite CM resource & the page it comes from that has a lot more info & narration links: http://simplycharlottemason.com/basics/started/charlotte-...
" Narration
When you ask a child to narrate, you’re asking him to tell back in his own words what he just saw, heard, or read. The narration can be oral or written or drawn — whatever. Because the child must think through the information and determine how to present it, mixed with his own opinion and impressions, this method of evaluation requires a much higher thinking level than mere fill-in-the-blank or answer-the-posed-question-with-a-fact methods. When requesting a child to narrate, word the question in an open, essay-type form, such as “Tell all you know about _____” or “Describe _____.” (See more ideas for narration.)
If a book you’re using gives a list of Discussion Questions, first ask the child to tell you all he knows about what was just read, then use only selected questions to cover any information he omitted. "
This is what I did with my son starting about a year ago ... specifically, because he wasn't getting the visual imagery from reading which really affected his comp.((Uber frustrating, took 2 years to figure it out))
We started out one sentence at a time, and gradually moved up to a paragraph, and then scenes. It took about 9mo-1year before he could do whole chapters. As soon as the mental imagery clicked for him, his comp went to about 99%. ((The 1% being names of incidental things, he has difficulty with remembering proper nouns)).
My son despises writing (the mechanics of it, no dysgraphia, just disgust), but loves acting... so he'd act out each sentence/ paragraph/ scene/ chapter. As a matter of fact, his writing slowed down his education so much that we're "bypassing" it to a greater or lesser degree. We film a LOT of his work that he presents orally. That way he can still learn at his own pace, while his writing ability sloooooowly catches up to his mental ability. But Oy! If we had to write down all of his work, what takes 30 minutes for him to grasp takes WEEKS. He gets so wrapped up in how much he hates the writing that what he's *supposed* to be learning just doesn't "store" properly.
But back to narration... there are tons of options. My son is into the whole drama thing, many children prefer to draw notes picture style ((LOVE these note pages, btw for drawing kids http://www.noeoscience.com/reproducible_narration_pages.html ... they're free reproduceable pages)). Others like putting it in their own words orally, others by handwriting or typing. There are tons of ways to narrate that can be used to gel with a child's particular learning style or inclination.