what does acrostic mean?
(Not a teacher)
An acrostic is a poem/verse in which the first, middle, or last (or a combination of thesE) letters, spell out a word/phrase.
The following is an example of an acrostic poem with the word 'stroud' formed from the beginning and end letters (taken from Wikipedia's article on Acrostic):
Set among hills in the midst of five valleyS,
This peaceful little market town we inhabiT
Refuses (vociferously!) to be a conformeR.
Once home of the cloth it gave its name tO,
Uphill and down again its streets lead yoU.
Despite its faults it leaves us all charmeD.