Dallas Maths Teacher doesn't quite get text language

I picked this one up from the chaps at Intomobile. A maths teacher in Dallas didn’t quite get what exactly some of the ‘sexually charged’ text abbreviations meant, I reckon.

Link:

Math teacher assigns sexually-charged SMS text messaging homework
Well, MyFox Dallas reports that this guy assigned his 6th-grade math class a homework assignment in which the kids were to decode a set of 20 popular SMS text message codes. Among them were the abbreviations for ‘Nude in front of computer,” ‘Parent over shoulder” and ‘Keep parents clueless.”