Hi~~~~When instructions say SSK do you slip purl wise and if so is the yarn in front or in back?? Thanks for your help!
Please wait for someone else to confirm, but I learned that unless it says otherwise, you slip it as if to knit with the yarn in back.
For the standard SSK you slip as if to knit with the yarn in back. 
There is another method called “improved” SSK where you slip differently. Here’s a link for that one if you want to see it.
http://www.knittingatknoon.com/impssk.html
Oh, I like that one. Thanks for posting that Jan!
When instructions say SSK do you slip purl wise and if so is the yarn in front or in back
When slipping purlwise this has to do with the how your ndl enters the st to be slipped, NOT the position of the yarn. As noted, if the patt wants you to move the yarn it would state as much but it’s unlikely in an SSK you’d move the yrn fwd as that would create a strand/bar at the base of the dec. Plus taking the yrn back over the ndl to do the K would add a YO.
cam