I am working to refresh the Terraform fundamentals section of the course and maybe more! The section will walk you through most Terraform features as you create a "repo factory" in GitHub and build out a developer platform to dynamically create repositories. This section doesn't cover everything yet, as it's still under construction. Honestly, you could probably pass the exam using the refreshed section alone as it is.

The refreshed section uses GitHub Codespaces and the other sections use Cloud9. The non-refreshed sections also use an older version of Terraform, but there's plenty to learn. You may get some deprecation warnings, however, so be aware if you decide to work in the legacy sections that some things are definitely outdated.