Interesting article about how to use Pinterest as the teaching tool:
Pinterest is the newest member to arrive on to the social media scene, and it has taken social media users by storm – quickly becoming one of the most popular social media platforms today. However, this site is not solely to be seen by educators as yet another classroom distraction. Pinterest can actually be highly beneficial for a number of reasons:

Lesson Supplements
When covering certain topics, whether it be World History or Trigonometry, use Pinterest to post lesson supplements. If you find articles, stories, or YouTube videos that will help students further grasp lessons, Pin them to that lesson's Board so that they have access to tools that will help them supplement their education.
Current Events
Simply by choosing to follow Wall Street Journal or National Geographic, you can keep your class easily up to date on the most recent breaking stories and finds. These stories can then be used to prompt further classroom discussions or debates, and even lead in to larger projects.
Project Ideas
Create a board on Pinterest exclusively for classroom projects with several Pins of different project ideas. Your students will be able to actually see previous projects, and get a better understanding of what you are looking for and what they can do to create a successful project.
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