New apps

I am always looking for new apps that will help me deliver information in interesting ways.  I am a special education teacher and I teach a pull out math class.  Screenchomp will give me the ability to demonstrate a concept and also send it home so the students can watch it again while they are doing homework or studying for a test.  I think that it will also be helpful for parents.  Many of my students go home and can't get help from their parents.  This could be their help.