C.C.
The best school either of my kids ever attended was Kid Time in Walnut Creek. Their method was to write a note about the incident, including what happened, where it happened, how it was resolved, and if any first aid was given. The teacher who witnessed the incident would fill it out. I think they were called "Oops" notes or something (it's been a few years). You'd get the note that same day.
Additionally the teachers made a point of telling the parents at pick up time what the kids did that day, and anything worth noting (they didn't sleep at naptime, or they wouldn't eat the lunch that was served, or whatever).