No two children react exactly the same on any given medication. You need to speak to your child's teachers, Pediatrician, and therapists/counselors, and make note of what symptoms are most troubling and problematic. That should help you and the doctor to decide which medication might help with those symptoms. Bear in mind that your insurance might also dictate which meds you have to try first before they will cover a med not on their Formulary (Preferred Med List).

My son has been on every medication there is to treat ADHD, and nothing had worked. In fact, the stimulant medication caused him to develop tics, and he was very emotionally labile and maudlin. He is now on Vyvance, and he says he likes it. I don't see a big change, but my son was self-medicating on caffeine to the max before this.
Perhaps you should ask the district to explore learning disabilities, or have your son evaluated for LD privately/independently.
My son is now obese due to years of psych meds, so the Vyvance is helping to curb his appetite, and he is losing weight. When he was first started on Ritalin, he looked like one of those children on the commercials about starvation. He had a flat affect (one of the things I can pick up when observing other children on Ritalin), and you could count every one of his ribs.
BTW, my son is now technically an adult.