Good work, Irena. In most schools, the teacher is supposed to submit lesson plans to her administrator (probably principal) on a weekly basis, which would include all the information you need to know. The Google classroom post may even be a required portion of her job. Either way, at the beginning of each week, she should already know to within a day (allowing for the class going a little faster or slower than projected) what should be on the board for each day. I'd continue cc'ing the principal every time you have an issue with her not posting that isn't immediately resolved.
