Thursday Morning Riddle

I come late in the week, by the Teacher’s designs,
Made of four anapestic tetrameter lines,
With a uniform rhyme scheme that slyly defines
A clandestine response using symbols and signs.

Who am I?

Why, the Thursday Morning Riddle, of course!

Every Thursday morning, I’ll post a riddle. The first one who solves it in the comments section is the winner.

Sound like fun? Then, jump right in! All visitors to the blog are welcome to play.