In the wake of sex-abuse revelations surrounding former Horace Greeley High School drama teacher Christopher Schraufnagel, school Principal Robert Rhodes is inviting current and former students to attend a talk on how to deal with such instances. In an email addressed to current students, plus alumni from the classes of 2015 and 2016, Rhodes outlines a forum that will be held on Sunday, Jan. 8. The session, according to Rhodes, will be held at the school from 3 p.m. to 5 p.m. at the First Congregational Church of Chappaqua.