Most chalkboards are in need of replacement. Surfaces have worn out, chalkboards can not be erased completely without washing the board, and often the previous image shows through.
Most chalkboards are over twenty years old, many are much older.
Institute a university-wide program to replace all of the chalkboards. Identify suitable replacement chalkboards through a one year pilot. This would involve placing different boards in several different classrooms on the North Campus and then surveying the instructors as to preference.