School Scheduling Software: what are you using?

[space-time]

for those involved in making the schedule for schools, what are you guys using? My dad just retired this year but he still makes the schedule for his former school, as a favour, since no one figured out how to use a software package to create a school schedule

he's using aSc TimeTables http://www.asctimetables.com/, before that several years ago he did it all pencil/paper

is there a Macintosh package that does similar things like aSc Time Tables?