What you need: KCDVR Key Chain Camera DVR, $50 

Risk level: Low

If spy glasses aren’t your style, you can still sneak in some snap shots with a miniature camera. There are plenty on the market, but we recommend copping the KCDVR Key Chain Camera. As its name suggests, it can fit on your keychain and can record video and take still photographs. And since it looks like the remote for a car alarm, we doubt it will set off alarms with any professors or proctors.