This 30 day Twitter challenge would be great to get high school students posting every day. There are examples within the post on how the challenge has been implemented before. There are fun and engaging posts for each day and it allows students to apply some of the challenges to their place of work.
An example an editorial calendar for a social media marketing plan Hootsuite comes through once again with this great advice on how to assemble a social media marketing plan! http://blog.hootsuite.com/how-to-create-a-social-media-marketing-plan/?utm_source=content%20team&utm_medium=owned%20social&utm_campaign=content%20team%20owned%20social%20twitter&hootPostID=8cd4a57383be6f1f1ae6dce6cf757c8f
Early December I did a periscope about hope I prep my social media using Buffer. I sit down and write 100 days worth of content in a couple of hours. (That's 800 tweets, 50 facebook posts, 300 Pinterest pins and 100 google plus posts). That periscope was by far my most popular and I got countless requests to go more in-depth, so here's a whole blog post for y'all.