I'm riding the fence here because I see both sides. My big question is if the student told the teacher at the beginning of the semester that he would be missing class because of baseball and if that would affect his grade. If she said it would, and there would be no exceptions, then the player will have to make a choice, take that honors class or play baseball.
I know how wrong that last statement sounds but here is my reasoning.
1. If the grade is weighted that heavily on participation there must be a reason that attendance necessary. You can miss a math class and catch up in a book, however classes that rely on discussion and verbal interaction should not be discounted.
2 I think it should be remembered that this is the last class of the day, minds wonder, clocks are always looked at, and students/teachers are easily distracted which takes me to #3.
3. Not only does leaving a class potentially hurt the player in question, it also may disrupt the class as a whole. I facilitate a 1.5 hour focus group twice a week. One of the members started leaving 45 min early once a week, when he left the group was not complete,
everyone seemed disrupted, and the "flow" was gone. I asked the guy why he left and he said that his boss had scheduled a weekly mtg with him during that time slot. I told him that either reschedule that meeting with his boss, or, find a replacement from his group to attend my weekly mtgs. I got a call the next day from his boss and after explaining that by his guy ducking out early the meeting lost it's momentum for that day and we spent the beginning of each new mtg getting him up to speed. The boss apologized explaining that his guy never said he was leaving my meeting early to meet with him. He went on to say that one of his pet peeves is someone his meetings early.
IMHO, when all is said and done this is an issue where a school policy needs to be developed for all athletes and not have a sliding scale per teacher.
Also, an important life lesson is anticipating potential issues. While I don't know the particulars in this situation I wonder if on the first day of class the player approached the teacher and brought up the potential scenario that this problem could have been avoided or a solution worked out