Resources to Support Challenging Child Behavior

What to do with “Wait Time”: Community
Situation: 

My child always seems to “get into trouble” or has temper tantrums when we are in public. He especially has a difficult time when he has to wait for anything! How can I help my child behave in public?

Work Ahead Flexibility: Math
Situation: 

I have a bright student in my math class. She knows much of the work and when we start the workbook pages she wants to keep working ahead. If I make her wait or stop her from continuing the back side she will tantrum. What can I do to make her follow along with the class?

Behavior Story: Restaurant
Situation: 

My child has a very difficult time going to family-style restaurants. In particular, he has difficulty sitting and waiting quietly, eating neatly, and interacting with the waiter or waitress. How can I help my child learn to be more appropriate in this setting?