There is also a video demonstrating the small sample you can knit with the entrelac guide. The video is in two parts, each about half an hour long. I show the sample knit from cast on to bind off - how to knit the base or foundation triangles, the right side triangles/rectangles, the left triangles and wrong side rectangles, and finally the bind off triangles.
This tutorial is for knitting entrelac flat. I also have a tutorial for Seamless Entrelac / Entrelac in the Round HERE.
This tutorial is just bare bones entrelac; there are many creative ways to expand on the basic entrelac I show you here. As I mention in the guide, there are a couple of books on Entrelac that I know of (the first one I have), and a Craftsy class on Entrelac. Here are the links:
Entrelac: The Essential Guide to Interlace Knitting
HERE is the class on Craftsy, taught by Gwen Bortner
And here are the two videos: