Here are some notes from faculty who use the iPad for classroom instruction.
The apps of preference seem to be GoodReader or GoodNotes for PDFs. KeyNote for slideshows, DropBox for managing files, Notes app, and Notability.
“I use dropbox to upload my slides and I use KeyNote to project my powerpoint slides, because I can annotate slides on Keynote, but not (easily) on Powerpoint. Other than that, I use no apps.” —Erzo Luttmer
“I still use the ipad. I only use the following apps in class: Zoom, GoodReader (for pdfs), Notes (for whiteboard), Keynote (for powerpoint).” —Doug Staiger
“Goodreader is good for marking up student work, screencasting a PDF and being able to mark up in realtime. Powerpoint + Dropbox. Notes app for Zoom office hours. Default screen cast is as good or better than any app for this in my experience.” —Paul Novosad
“Yes, have continued to use my iPad while teaching in the classroom. I start a zoom meeting from my iPad and then join the meeting on the classroom computer. From the iPad I do a screenshare and open my slides in the notability app and write notes on them during class.” —Steve Mello
“I mostly just use notability.” —Eric Edmonds
“I used a Microsoft Surface during Covid. I no longer use it for instruction, although I have used it to make short videos with graphs and diagrams. My one big disappointment with the Surface is that it does not support apps, such as NY Times, Kindle.” —Doug Irwin