summary the videos and answer the questions please.

Jigsaw: Management in the Active Classroom:https://www.youtube.com/watch?v=_YG1dkbYSV8

1. What is an expert group?
2. What is a jigsaw group?
3. According to the text, would a jigsaw classroom be utilizing individualized, competitive, or cooperative goals, and how do you know?
4. What kinds of benefits come from this type of classroom?

Peer Influence and Adolescent Behavior: https://www.youtube.com/watch?v=rt9MyNo65eI

1. Explain the setup of the experiment using the "stoplight test."
2. What were the results of the "stoplight test" with teenagers and with adults?
3. What is the ventral striatum responsible for, and what happens in adolescents' ventral striatum when doing the "stoplight test"?
4. What are some of the real-world implications of this research?

Inside the Teenage Brain - The Wiring of the Brain: https://www.pbs.org/wgbh/frontline/film/inside-the-teenage-brain/

1. What did Dr. Geidd find regarding the frontal cortex, and why was it surprising?
2. What is the result of this change in the frontal cortex when we examine thinking and behavior?
3. What is the prefrontal cortex responsible for?
4. How does brain development relate to risk taking?