Anonymous wrote:sounds like you didn't think this through, maybe you should work on the marraige
That is not helpful.
OP, I am divorced and for "family pictures" we sent 2 pictures. Her teacher understands. She offers to have separate parent-teacher conferences, which we only do if there is a timing issue. Our custody agreement specifies that DD will be with me on Mother's Day and with her dad on Father's Day. I help her to organize presents for him for his birthday, Christmas and Father's Day because she is 5 and would not be able to do that on her own. He does the same for me.
We are divorced, but we are both still her parents and respect each other's status as such. It is important to me that DD maintain a good relationship with her dad and be generous and considerate. Part of that is gifts/recognition for days that are special to him, like his birthday and Father's Day. I will facilitate that until she is old enough to handle it on her own. If he stops doing the same for me, it will not change my behavior because it's not a tit-for-tat thing to me.