This editable doc contains five on-line sources relating to the topic of peer pressue. All five sources are links to full-length articles, research, etc.
The format of the writing prompt follows the AP Language template for the synthesis question. You could edit the sources down to just a few; you could divide the class into groups and have one group report out on the article / research, etc. You could also use this as a resource for students who are beginning to conduct research on the impacts (both positive and negative) of peer pressure on children and teens.
If you are working on PARCC preparation for the PBA and EOY essays, this resource will allow you to have several resources at your fingertips.