(1) School band director In the US, public school band directors are generally either music education majors or education majors with a minor in music.Thus they fulfill the university's general requirements in math, English, social sciences and sciences (biology, chemistry, etc.) and they have taken music education and general education course that allows them to graduate.
The clear plastic tri-folds do not seem to cushion the eggs as well nor insulate as much as the foam. Pulp cartons are possibly more environmentally friendly being made of paper and all, but they cannot be cleaned. Once they get dirty there is nothing to be done but toss them.
Some egg cartons have sell-by dates on them, while others have expiration dates. Neither should be regarded as an indication of when the eggs are no longer safe to use. Both the Food and Drug Administration and Egg Safety Center agree that eggs are usually good for several weeks past the stamped date.