Here is a page of exercises I wrote tonight for a student who is developing their right foot. We worked on playing two sixteenths using heel-up and heel-toe.
I thought it might be useful to post the sheet up here. I would start playing at 60 BPM to ensure that all the strokes are lined up. Count out loud and think about the balance between bass snare and cymbals. Play the bass sixteenths nice and even.