TACKK is a free amazing simple platform that can be used to communicate in a variety of ways including images, audio, and video. As of fall 2014 there were no limits on how many TACKK creations can be produced. The TACKK design team is in the process of creating a way for educators to set up accounts for teachers so that students can create under one account. Email verification is needed to set up an account.
As of this post the embed html provided will work in blogger and NISD teacher websites. It was not able to be embedded in Wordpress blogs.