Did the way the course is done move away from codepen?

I’m not finding anything about this by searching the forum.
I had a bit of a false start a couple years ago when I first came to FCC. I just came back to it again about a month ago.

When I came back and logged in it seemed like the thing to do was to follow along with the classes in the FCC site coursework. But, it seemed strange and I couldn’t put my finger on it.

Now I remember. I used to do everything in codepen and there was some kind of Test Suite that ran tests on the project. It’s still there in some of my old pens.

Did FCC change how they do things? If not, which should I use?

Yes. Submitting the projects on freeCodeCamp is part of the new curriculum update.

You should use the new curriculum.