High school student confronts teacher after they give her the lowest grade on a group project she did all the work for: ‘I should've gotten the grade I deserved’

The grades were based on presentation, not the effort?

When a student finds themselves doing all the work during a group project, the one motivation they have is to get a good grade. Sure, it's annoying to do all the work while your classmates are slacking off and doing nothing, but at least at the end of the day, you will get the grade you deserve for all of the hard work you've put in. It's genuinely easier than starting a battle you will most likely lose. Even if you classments end up getting a good grade for a project they didn't contribute to, at least you're getting a good grade as well. At the end of the day, the grades are what matter in school, right?

That was the thought process of the 16-year-old student in the story below. She had a week to make a presentation with her two classmates, and it became clear pretty early on that she was going to have to do all the work, and she did. 

After the presentation, the teacher graded all three students, but she gave the hardworking 16-year-old the lowest grade of the three. The teacher claimed that she was grading them all based on their performance during the presentation, and not the work done beforehand, and she was the least active out of the three. The student, on the other hand, thought this was completely unfair and insisted that the teacher grade them based on the effort they've put in. She also made sure the teacher knew she was the one who did all the work to put the presentation together.

This was no help. The teacher refused to change the grades and even contacted the student's parents and informed them of the disrespect she demonstrated in class.

Was the teacher right, or does the student deserve a higher grade for all her hard work?