This resource introduces the concepts of rhythm and melody connected with tablet technology, in this case, iPad using GarageBand iOS. Later, it uses ScoreCloud Express and ScoreCloud Studio, free for any platform.
I've used it to introduce Pentatonic melody writing to Grades 4 and 5, but could be extended to Grades 12, with modification.
Within GarageBand iOS, students can select the scale type that the keyboard will display. I have them using Major Pentatonic and there are others. Have a look at my GarageBand iOS Quick Activity Pentatonic Composition, available here. It's clearly laid out there.
The basic idea is to have students use a variety of means to learn to notate music, either by regular or graphic notation - most importantly, for creation and sharing.
Check out my free Recommended Melody Creation Apps PDF for February 2016 for other ideas about graphic notation and apps that offer this.