free teacher accounts which are certainly worth the trouble of creating. Teachers can create student accounts and also limit the features accessible to students using Kerpoof. As an added bonus, there is an entire Kerpoof for Teachers page with lesson plans, standards, a useful newsletter, and more.
There are many options available within Kerpoof studio, and some are more educationally appropriate than others. It's important that students using this tool have a clearly identified learning goal when using Kerpoof in an educational setting or they will just play.
A word of caution...