Administrators will vote later this semester to officially implement alternative grading.
Penn State hopes the decision will ease high schoolers' anxieties while testing is disrupted by the coronavirus pandemic.
Chu, 69, served as one of the college's original faculty members when it first enrolled students back in 1999.
Nominations for three alumni-selected seats will be accepted through Monday, February 25.
Spanier's defense lawyer said his client serving a jail sentence at this time is "absurd and irresponsible."
In his statement, Barron denounced the attacks and reiterated that violence is "never the answer."