One of the recurring problems with many of the web-based tools for collaboration is having to manage a long list of email addresses every time you want to share something - for example with a class. Managing groups of people by hand is difficult - as people come and go these groups can get out of date very quickly.
Salamander is the system we've deployed to solve that problem. Every evening it checks SIMS and makes up to date groups for year groups, forms and timetabled classes and gives each an email address. So far we have it set up at Malcolm Arnold, Lodge Park, Skegness Grammar, Havelock, King Edward VI and Charles Read academies - with all others to follow in the next few weeks.
This video from the dret.tv training channel explains more.