Pair programming on Code.org, in its current state, is designed to be used by students sharing one device and working together on one device, and is primarily designed for use in K-5 courses (not within AppLab or CS Principles). We also don’t support live collaboration between students (and/or between teachers) on one single project or puzzle, but are working on such updates. Paired partners won’t be able to see the “driver” student’s work until after they finish a given puzzle. If you’re a student working on one computer (entering code yourself), and you’re paired with a student working on another computer, the paired person won’t see your code written in real-time. You’ll need to finish the level yourself, and then your paired partner can go back and look to see what code you’ve written.
If you want two students (or teacher and a student) to be working on one project, and for them to use pair programming, they will need to make sure they are signing into the site at completely separate times (without overlapping), or the person who signs in after the first person will not be able to see the updates made by the first person. Our apologies for any inconvenience on this, and we appreciate the feedback!