Study the following sonnet and look up the linked words. If you don’t understand the English definition look up the word/phrase at PONS.
You tell them (erkennen an) by their wobbling zigzag stride —
They stagger into class for one half-hour,
Head down and collar up, so as to hide
The fact that eyes are glazed and breath is sour.
With brains unhinged by hashish, pot, or coke
They sit there in a semi-conscious fuddle.
They don’t buy textbooks, never take a note;
Their prose is sheer confusion, utter muddle.
Their mouths breathe forth a narcotizing vapor;
They sleep in class, or leave before the bell —
They miss the midterm, don’t submit a paper,
And log four weeks of absences as well,
And then drift to your office, in a daze,
Inquiring why they haven’t gotten A’s. 
By Joseph S. Salemi „Contemporary Sonnet 1“
If you like you may write your own poem (or even sonnet) about terrible / tedious / tenacious / tense teachers 😉
 In US high schools there are letters from A (the best) to F (for fail) instead of our numbers (from 1 – 6).