Apparently standard, but my guess is some schools do it better than others. While it is important to maintain some degree of didactic education, there is a balance against making you so peripheral on your clinical team that you aren't really involved in your patient's care. On some of my rotations, the didactics were very well done and complemented the rotation nicely. On others, we felt like we were constantly being pulled away from the service for lectures that were mediocre at best.
Best,
Anka