Core 1,2 and 3?

Many of the plans are written by the coaches of D3 Multisport.  I haven't found the core workouts on BT but I did find them on the D3Multisport.com.  Here's a link to core 1 and from there you can find all the way to core 6.

I wish that there was a better description or a link to the core workouts from BT.

You can find the link to those plans in your training log.
Hover your cursor over the "Current Plan Information" link at the top of your Blog View, and a window will appear with different links. One of them is  Stretching, Weight Training and Core Strength Information and Links.
That article has links to all the Core routines.

You will also find the link directly from the main 'Program' page near the top.

Now I feel like an idiot.    It seems that there are links to the core workouts all over the site.  I just looked everywhere but where I was supposed to.  Thanks for pointing out the (now) obvious links.

Found it. Thanks everybody!