If Muffet's graciousness had as big an impact on you as your post suggests, you might want to consider a handwritten note.
There is absolutely nothing wrong with an email (many people wouldn't even take the time to do that), but a handwritten note often conveys a greater level of appreciation.
Since I notice we were contemporaries, thought I'd let you know that I saw Fr. Rich at Kevin Dolan's annual St. Patrick's Day party, he seems to be doing great.
and teaches at my son's high school--appropriately Notre Dame College Prep.
Talking to him about tons of issue. Felt like I was talking to a father and not a priest.
E-mail addresses are shown for each assistant coach, but not for Coach McGraw. However, if you want to send an e-mail to her administrative assistant, and ask her to deliver it to Coach McGraw, I'll bet that would work. Her name is Sharla Lewis, and her e-mail address is: firstname.lastname@example.org