We have had some great tips from teachers over time about using Historypin. Here are a few bits of feedback from teachers at different grade levels:
Some overall admin issues to think about, via a Rutgers University teacher workshop on using Historypin: http://blog.historypin.org/2015/08/05/wed-like-to-hear-from-you-teachers-using-historypin/
A middle school social studies teacher stresses the use of a template with her students for our Uncovering Mississippi's Hidden History project: http://civilrightsteaching.org/4532/
How Grade 6 students in Labrador, Canada used Historypin for a classroom project: http://blog.historypin.org/2012/06/26/amazing-stories-discovered-by-qmps-students-in-labrador-canada/
Results of Slippery Rock University students using Historypin for an undergraduate digital history course: http://publichistorycommons.org/doing-digital-history-at-slippery-rock-university/ and http://blog.historypin.org/2013/07/10/incorporating-historypin-into-college-coursework/
Building a peer-based learning activity with student curators of the Phillips Museum of Art at Franklin & Marshall College: http://www.fandm.edu/frames-mountings-blog/2012/11/28/fostering-21st-century-skills-at-the-phillips-museum
Do you have any tips from running a teacher workshop, or running Historypin with your students?