I have been a part of Shaolin Arts for the past 6 months and can say it has been a wonderful experience. The school I attend is on Cave Creek Rd., just north of Sweetwater. My instructor, Mr. Gellerman, makes learning Kung Fu and or Tai Chi, fun and makes you want to return more often. Also, he gives private lessons to students once a week, for one-on-one study so you can learn or understand better something you didn't pick up in regular class.
One of the great things about the school is it's a pay per month, NO CONTRACTS! They have a youth class for kids.
There are other schools in the Phoenix Valley. Look on there website for a school near you.