I transmitted the substance of this post to Math-Teach on 01 Feb 2014 ~15:00-0800 but so far (02 Feb 09:40-0800) it had not shown up on the Math-Teach archives at <http://bit.ly/eOTrs1>.* Here's a second try:
In the abstract of my post "The Defiant Parents: Testing?s Discontents ? Response to Hunt" [Hake (2014)] I wrote:
"Modesty forbids mention of these examples. . . .[[of "formative evaluation" in the JCSEE sense]]. . . . . . 7. 'SET's Are Not Valid Gauges of Students' Higher-Level Learning #2' [Hake (2011b)] at <http://bit.ly/jLZaz5>."
In response, GS Chandy (2014) questioned the use of the apostrophe in the word "SET's" claiming that "SET's" means "SET IS".
"USE IN FORMING CERTAIN PLURALS: An apostrophe is used by some writers to form a plural for abbreviations, acronyms, and symbols where adding just "s" rather than " 's " may leave things ambiguous or inelegant."
"A little Learning is a dang'rous Thing;? Drink deep, or taste not the Pierian Spring:? There shallow Draughts intoxicate the Brain,? And drinking largely sobers us again." - Alexander Pope in "An Essay on Criticism"
REFERENCES [All URL's shortened by <http://bit.ly/> and accessed on 02 Feb 2014.]
Chandy, GS. 2014. "Re: The Defiant Parents: Testing?s Discontents ? Response to Hunt," online on the OPEN! (but heavily moderated) Math-Teach archives at <http://bit.ly/1fBdaLr>. Post of 01 Feb 1:42 am (the Math Forum fails to specify the time zone).