My first PC-compatible was a Zenith 386sx. It had a 40MB drive that I upgraded to a 120MB drive...lots of space! Before that I was a TRS-80 die-hard since the late 70's.
 
In 1994 I bought a Gateway 2000 Pentium 90 with a 540MB drive. At the time, it was the largest hard drive you could get without having to install a special driver or get a BIOS update to cross he boundary in disk size.

Is what she wants legal? I don't know.
Is her taking of your notes out of your bag legal? Probably not. I don't know.

However, that she asks the question in the first place means that she doesn't want her students to learn. She just wants them to pass tests and graduate. She is not a teacher.

The purpose of teaching is to pass information from one generation to the next, hoping the next generation turns the information into new knowledge. People don't have perfect recall. They need notes and books to retain information. If the teacher doesn't want you to keep your notes then she is paranoid about cheating, and doesn't care if you learn anything or not. If I were a student, I would refuse and force her to take it to the dean, then to the police if necessary.

So call now and get yours! We can't do this all day.

Except they don't. The LED's themselves might last forever, but the circuit boards they're attached to don't. I have seem many traffic lights in the middle of summer have missing sections of lights, and others where sections flicker on and off like there's a loose connection. They look like pies with a wedge missing. Soon the light is replaced and it looks whole again...until the cycle repeats all over again.