As certain as Death And Taxes

[therrin]

When you grade a homework set, you can frequently tell where a student got help with their answers

Comments

[jedifreac]

This is where you have fun calling them out on it.

[jedifreac]

If they all seem really similar you could start acting like you suspect plagiarism. Read the most generic sounding one aloud and the entire class will think it's them unless they have memory of what they wrote down.

You could scare the living daylights out of them, dude.

*cackles evily*

[swmartin]

Google has become the ultimate bane of plagiarists. It's considered common practice at many universities to Google few key sentences from each paper, or at least a random sampling. A shocking number turn up exact matches.