The recent update to Noteflight has many significant changes. One new feature in particular will help us give our students a way to better hear their harmonies and adjust them more easily. Noteflight now allows for changing the playback speed without having to alter the composition's tempo.
We used to suggest that students temporarily make the tempo of their piece so that they could hear and discover dissonances. This was often too complicated and clunky for students to manage. Now, when playing back a score users will see a new option for "speed." See the video below for more details!