DIY--public portfolio under parents' or teacher's email account. Designed for kids. Kids can upload videos and images of projects. Fairly new and worth exploring.
Is YouTube blocked inyou school? Here's a 'video catcher' that allows you to capture and use later. It's a good work around for blocking. In my opinion, too many schools block YouTube when there is good content to be found (though there's a lot of junk as well).
Notability is an iPad app for note taking that allows collaborative (or not) notetaking with sharing options. Plus it works with Dropbox (cloud storage)
Grokking is new to me--looks like a powerful search possiblities that allows a mindmap of related terminology. You can create a teacher account, specify difficulty level, create graphs and more. Looks very interesting.
Collection of websites based on their usage (e.g., communication). Recommended by Peter McDermott, President of the NYS Reading Association (2012-2013).
"Fast layout and customisation of photos, video, text and music.
Add media hotspots, narrate interactivity. Publish to any webpage" Lots of recommendations, many of which are in RWL 513.
Edumodo has lots of potential for teachers and students; you can control who is part of the group and you can monitor, two important considerations with social media and students.