coperative learning using STAD and TGT

a person who are practice cooperative learning in classroom . I have the following questions
1. In the case of TGT models of cooperative learning , The students are playng acadamic games in the tournament table. How they play each other ?
2.I want to assses my students attitudes to wards cooperative learning in mathematics class room .so Is there standardised attitude questionniers towards cooperative learning?
3. Is there adiference between TGT(team game tournament)n and STAD(student team achivement division )models of cooperative learning? is it possiple to teach students by using both method sumentiliously in classroom .

Thank for your response