Slip, Slip, Knit

A Slip, Slip, Knit, or "ssk" as it's usually called, is the right-leaning companion to the knit two together decrease. These two decreases are often used together to create directional decreases that mirror one another. 

If you haven't already, familiarize yourself with the different styles of knitting before continuing. There are three different ways to hold your yarn when knitting and you want to make sure you're watching the right technique for you.