Thread:Hades AKA NeuroSurgeon/@comment-22439-20140720020102/@comment-24808864-20140720181408

Mastery challenges.... I sometimes wait to get my speed badges when I am leveling up to mastered for this very reason (so I don't forget which ones I need to do). Unfortunately the timing tolerance on newer exercises is sometimes too tight, and so I have to leave it until later.

Have you seen Peter Collingride's site, http://whatbadgenext.appspot.com/ ? You can sign in with your KA credentials and it will tell you which badges you can get listener, speed and streak badges in. Unfortunately the "speed" badges have not updated for me in several months so it might be a change in the KA API or something like that (I am not very tech-savvy, someone else will have to figure out what is going on).