I noticed great 21st-century learning when I shadowed a student through her day as an 8th-grade student. The experience left me wanting to see more student creation and publishing.
It was heartening to see teachers leaving the stage as evidenced by just a few minutes of the teacher addressing the whole class in each period. Students worked on engaging material at their own pace using Chromebooks.
In one class, a teacher led a whole-class discussion about the death of Keith Lamont Scott at the hands of police. The discussion was good but I was left with the question, "so what are we doing about it?" I connected that with what students are doing in class - are they creating, making, publishing, and interacting with people beyond our school's walls? If students are creating on a regular basis, a discussion like that can be followed by student action.