Single word for lazy student

I'm looking for a single word for "lazy student". In my own language there is such a word that a teacher would use for a student who doesn't engage and doesn't care. In English, the word "slacker" is the best I could think of.

Answer

Slacker — Dictionary.com

a person who evades his or her duty or work

Good-for-nothing — TFD

A person of little worth or usefulness.

Couch potato — TFD

an idler who spends much time on a couch (usually watching television)

_{Couldn't find any word specifically tailored for students. Aren't most students like this anyway?}