It is suggested that a teacher can improve her/his communication by following…

Effective communication is often taught through two complementary checklists: the 7 C's of Communication — Clarity, Completeness, Conciseness, Concreteness, Correctness, Courtesy, and Consideration — which govern what is said and how it is structured; and the 4 S's of Communication — Shortness, Simplicity, Strength, and Sincerity — which govern how it is delivered, emphasising brevity and credibility.

A teacher who wants to improve her/his classroom communication is advised to follow BOTH checklists together — all seven of the C-named principles and all four of the S-named principles — which is exactly the pairing described as "Seven C's and four S's".

• "Six C's and three S's" is a shorter pairing than the standard combined checklist — a partial recollection of both lists, not the complete pair.

• "Eight C's and four S's" recites an extended or duplicated version of the C-checklist that goes beyond the standard list used here.

• "Seven C's and three S's" recites the C-checklist but pairs it with a shorter S-list than the standard combined checklist.

Only the alternative that keeps BOTH checklists at their standard length — every C-named principle together with every S-named principle — matches the combined framework taught for improving a teacher's communication, confirming "Seven C's and four S's" as correct.