I'm so pleased you are so sensitive about this condition.
I have two children (out of 4) who have suddenly developed severe Tourettes in the last year. Their school have also been very good at endeavouring to understand and help them
In my experience the condition is very variable and it would be a good idea to speak to the child's parents for their individual picture. Tourettes is often associated with co-morbid conditions. Sometimes my DD does take liberties in class, and it's not her Tourettes - just her personality
Particular points that I have found that are not obvious are
Just because a child with Tourettes is not tic-cing, it doesn't mean to say they are not suffering - or working extremely hard to contain their tics. My two know they are now different to everyone else in their class, and they just want to be normal. My DD has a traffic light system for when she wants to leave. They have both had to be encouraged to ask for breaks during the day.
Tics or suppressing tics can be exhausting - both of mine have gone for rests during the day
Tics can affect their concentration - both of mine are at the top of their class- but both now find Maths much more difficult. However, their art has improved!
Assemblies/ having to sit still in a crowd can be a nightmare. DD had an awful time at the Church service last Easter. She had a very prominent seat and just felt everyone was looking at her. I could see how hard she was having to work just to look normal. A seat at the end of a row - with an escape plan - takes out the anxiety & possibly any need to tic.
Emotion/ conflict/stress or tiredness all make tics worse. My DS sometimes has to walk away in the playground - even if his friends are just play-fighting - otherwise he might well make a rude gesture or swear at them. DD has recently said she has the same experience. Rage can be a feature of Tourette's
I emailed the other parents to let them know my DCs diagnosis. It seems to have been the right thing to do. DDs friends are well aware - she is 13 and had help from the hospital to tell others about her condition. DS is 11- his friends are aware - but have less understanding - which is totally understandable.
Tics can be anything. It's basically stored motor acts or vocal sounds that are unleashed from the brain. Sometimes they can be suppressed, sometimes they come out so fast the child can't help it. Both of mine tic much more at home than they do in public.
Some activities help Tourettes. DD finds sport helpful, but DS tics even more when he's running - he finds art or music helpful.
I hope this helps