This poster (A4 - A3) is a representation of the various ways students may choose to share their music ideas.
Most apps use graphic notation and from my experience, being used more easily than traditional notation, especially with older students. Many apps also are promoting graphic notation. Please see my Recommended Melody Creation Apps as of February 2016 to see a sample of this (available FREE from this site).
My new page, "Quick, large format Music Staves for students" available here ($1.00) supports this use of graphics notation, as well as traditional.
Please let me know about your experiences with graphic notation with students. I'll be testing it out over the next few months.