Can a high school teacher dock a student's grade for them being absent?

In a DE class that I'm in we were told that if we were absent we would lose points on our project as "our group needs us". Later that day I became ill and won't be able to attend school, can she dock my grade or do I have standing to bring it to the principal in contestion if she does?

My absences are excused by a parent for illness.

Submitted November 27, 2018 at 06:24AM by MagicCooki3 https://ift.tt/2FGZmFR