PTNC is a teacher's email list for school teachers who teach physics. PTNC (Physics Teaching Notes and Comments) was originally run by the Institute of Physics on its servers as a service for physics teachers. When the IoP decided "as a charity with limited resources, we have to focus those resources on where we can have the biggest impact for the most teachers" (posted on PTNC, November 2023), and this meant no longer supporting the list, PTNC moved to groups.io, with sponsorship from PhysicsOnline.
The group is open to new members who teach physics or otherwise support physics education. The homepage is https://groups.io/g/PTNC.
