We can define the technical level of presentation by saying that calculus symbols and equations can be used as long as their significance is also explained in words. The implication of this stricture extends to all kinds of technical jargon and sophistication. The question of technical level involves more than just math ability, however. The cartoons useful in one sort of school may be considered bizarre, in another. Whimsy is a fragile literary form.
Limericks are particularly delicate.
One of these would be a tutorial in physics on a topic that we all teach, but treated with a modern approach or including useful background material. The second would be pedagogical, perhaps a summary of research in some new classroom technique, or advice on how to hold the chalk, or a review of a current learning theory. The third would cover some current research or important news in physics itself. The fourth would involve history, or philosophy, or biography of interest to physics teachers. We solicit these articles, seeking authors who give good talks at meetings or who have been suggested to us by readers.