If he is on a Chromebook, he's probably using the Web Editor and not the IDE.
This has been an exercise in pulling teeth.
He doesn't seem to want help because he's been awfully secretive about whatever he is doing and using.
Wasted 3 days in this nonsensical drips and drabs of info.
Apologies for the dribs and drabs, not intentional just very very new to all this. I've trying to be brief so as not to waste peoples time, seems I've been way too brief. Let me try one more time.
I've been using Arduino Create web editor to write and upload code to my arduino.
I've also used Chromeduino which is another we editor.
both have serial monitors associated with them.
I have tried a bunch of different web based and chrome app serial monitors such as "serial monitor" https://github.com/garrows/browser-serialport, "Beagle Term https://github.com/beagleterm/beagle-term.
When I use the serial monitors I see a stream of data that is being sent via serial.write command. The data comes from sensors such as grove temperature sensors. The issue for me is that I want to be able to save the data to a text file so that my students can process it in a spreadsheet.
I hope that this extra information helps and does not cause anymore toothache.