Some reasons a teen might use Marijuana:
#1 They want to know what it's like.
#2 Other people are doing it.
#4 It's an 'escape' from everyday problems.
#5 To get high or feel good.
Some reasons a teen might not use Marijuana:
#1 It can affect physical health
#2 It can affect mental health
#3 It is a gate way drug
Hope this helps!!
While I do understand this is what they teach students, I just want to say I DO NOT agree with these reasons. I have known people who have smoked there whole life and show no signs of any sort of 'disability.'