Our seventh through twelfth grade students have touch screen Chromebooks and recently I came across this website www.awwapp.com that allows you to draw online and then download the drawing as a jpeg.
A Web Whiteboard is a touch-friendly online whiteboard app that lets you use your to easily them with the world.
You can free draw, type as well as insert a picture and then draw on top of the picture. You can invite others to your board via a link or email and can download your image. Whether you are labeling a picture, drawing out a math problem or typing an answer to a question, this app is a very useful tool in the classroom.