I saw a great use of Padlet by an academic in the sciences last week which seems to have really gone down well with their students.
They decided to summarise a key biochemical process on a Padlet wall using a mixture of media on the wall to illustrate different points. Several students commented how they found it more interesting to explore the Padlet to discover the key points about the process.
It strikes me this is an appraoch that is simple and could be used for any subject area.
SMART Teaching 