This is an age appropriate way to teach elementary students about peer pressure and standing up for their own beliefs. It is a power point slide of 'what would you do'. There are multiple slides with two choices on each slide. Students stand on either side of the board voting on which they would choose. Choices start simple (ex. pizza or tacos) and get progressively more thought provoking (cheating, stealing, etc). After the choice slides, there is a slide of discussion questions that relate the activity back to peer pressure and making ones own choices.
I do this lesson with 3rd grade students, but it could easily be relevant for 2nd-5th graders. I start the lesson by telling students we are going to play a game and I explain the concept of choosing one or the other. I tell students that there is no right or wrong, they should just be honest and pick whichever side they want; but they cannot be in the middle, they have to pick a side. That is all the direction I give. Throughout the game, I watch and listen for examples of peer pressure (they are inevitable: students calling eachother's names, telling them they are wrong, booing, etc). After the game, we go through the discussion questions one by one and I reference some of the things I saw.
The final side discusses the importance of having a reason WHY you want to make safe and healthy choices. It gives examples and encourages students to think about their why. I often make a poster that pledges to make good choices and allow students to sign their name are write/draw their reason.
This lesson does not reference drugs or alcohol at any point (although there is room to add your own slides if you wish to add choices); it only uses the verbiage of safe and healthy choices.