We could take a paper plate and shoot one shot each morning. Mark each shot with number 1-7. At the end of the week, post a picture of our plates and our first shot groups. We could do a different distance or a different position each morning.
Something like this ( with the target at 12:00):
Monday, 10 yards, kneeling, facing 12:00.
Tuesday, 12 yards, standing, facing 9:00.
Wednesay, 15 yards, kneeling, facing 3:00.
Thursday, 17 yards, standing, facing 6:00.
Friday, 20 yards, sitting on a bucket, facing 2:00.
Saturday, 10 yards, crouching with the bow horizontal to the ground.
Sunday, 13 yards, standing, facing 6:00, reverse cant.
Bonus shot, 20 yards, laying on stomach.
I basically do this anyway, mixing it up a lot.