  The recruitment of teenagers for usable privacy and security research is
challenging, but essential. This case study presents our experience using the
online flier distribution service Peachjar to recruit minor teenagers for an
online security experiment. By distributing fliers to 90 K-12 schools, we
recruited a diverse sample of 55 participants at an estimated cost per
participant of $43.18. We discuss the benefits and drawbacks of Peachjar,
concluding that it can facilitate the recruitment of a geographically diverse
sample of teens for online studies, but it requires careful design to protect
against spam and may be more expensive than other online methods. We conclude
by proposing ways of using Peachjar more effectively.
