My 13 y/o son was diagnosed with ADHD in kindergarten and we reluctantly started him on meds. He's always had OCD traits: smelling his food, his socks have to be just right, ect. The tics started in 3rd grade with squinting. They have come and gone and changed many times. The tics increase with stimulant type meds, but other meds do not work for the ADHD. Strattera alone did not work for him. HE is now on Strattera 60 mg and Concerta 27 mg ( a really low dose) and for the tics he is on clonodine .1mg at bedtime and .05 mg in the morning. The Strattera makes the Concerta work better, that's why the Concerta dose is so low. This doesn't "fix" everything, but that's not going to happen. My son can function pretty well at school. He has quite a few male friends and is really popular with the girls. He wants something different that will work better on the tics. I guess I will be talking with the Dr. again soon.
There are some really good Tourette's sites out there, they will give you good information. The teachers probably don't know much about Tourette's so you may have to show the some "accomodations" to put in place at school to help your child. Try the "virtual hospital" site to access these.
This is a continuous struggle for us, but my wonderful son is worth every minute of this. Good luck on this long journey.