Is it appropriate to share the distribution of grades for a small class? It is common practice to share a histogram of grades with a class after a quiz or exam. However, my institute has very small classes. This year I have 6 students in my class, and in previous years I have had 3. It seems like showing the breakdown of grades (e.g. how many A's, B's, C's there were) in such a small class may be inappropriate, since students may easily be able to guess who got which grade. On the other hand, it seems only fair to tell students how they did relative to the rest of the class.
No, for exactly the reason you give. If just a couple students share their grades with each other, it becomes trivial for others to be discovered by process of elimination.