What is screencasting?
Screencasting involves creating a video for instructional uses. Perhaps you'd like to work out a few sample math problems to reinforce those skills with your students. Maybe you need a resource for students to turn to when they must join two sentences with a conjunction. Whatever the skill, you can create a recording (or screencast) of yourself to help students later.
Option 1: SMART recorder
Anyone who has downloaded SMART software on his or her computer can use the SMART recorder tool to create a screencast. If you happen to have a SMART board in your room, you have the added bonus of using your board and pens to do the work. Watch the video below on how to get started.

The output file for SMART recorder is a wmv; Windows Media Player is the default player for these files.
Option 2: Show Me App
There are many different apps available that can be used for screencasting. If you go to your App store, simply run a search for "whiteboard apps." One of the apps that is very easy to use and publish with is called Show Me. Check out this video below for a quick example.

Most whiteboard apps publish either privately or publicly to the web. You can share a public link with your students to use in class or at home. Here are ten great reasons to give it a try and instructions! Show Me 101 - The Basics

Examples by Content Area:
Byzantine Empire
Linear Equations in Two Variables
Osmosis in an Onion
Phrases and Cluases
Three Strategies for Teaching Grammar in ESL

Share Your Show Me Tutorials on Teacher Webpage or Edmodo Group