Great example of an open group desk arrangement. Student desks are in groups, but all face the smart/white/chalk board. This arrangement facilities a great environment for establishing good student-student relationships.
Calming jar-tell child that they need a break and may come back when everything has settled to the bottom - I think I love this idea. Better than a simple time out for temper tantrums. some days I think that I need a calming jar.
An Apple For The Teacher: Stickers - I like this idea. Instead of putting stickers on students give them a small notebook for them to collect their stickers. I can see creating a rewards system around this