For Jack and Jill.

The above motivational video is from the web page of a middle school
math teacher who was shot to death yesterday morning.

Related journalism —

IMAGE- Scene from a blackboard jungle

See also "S in a Diamond" (here, October 2013)
and "Superman Comes to the Supermarket,"
by Norman Mailer (Esquire , November 1960).

In a recent film, Amy Adams asked Superman,
"What's the S stand for?"

One possible answer, in light of Stephen King's
recent sequel to The Shining  and of
the motivational video above—

Steam.