So my guitar teacher suggested that I download a metronome that plays drum beats instead of beep beep beep beep...

Well, I've been looking around and all I've found is a metronome that plays either the high hats, toms, snare, or kick at the specified speed. What he showed me were actual drum beats that could sound like from a song and then the overall bpm could be manipulated.

Does anyone know what that is, and where I could find it?

i'd invest in FL studio, or even guitar pro. the sound quality isn't really an issue with just metronome stuff, so a tablature program or simple DAW will give you all that power and more.
Quote by Kevätuhri
Hail isn't too edgy for posts, posts are not edgy enough for Hail.

Quote by UseYourThumb
You win. I'm done here.
I use TuxGuitar, it's free, and works just fine. You can also export the beats to MIDI if that's what you want.
Quote by Green_Ghoul
hmm, I have that on my linux partition...is it hard to make drumbeats with?

It's fairly simple, you just need to learn which number corresponds to which drum. After that, it's easy.