Every Sunday Mormons attend a three hour block of meetings consisting of three separate classes/meetings. Those three hour blocks include a Relief Society or Priesthood Meeting, Sunday school and Sacrament Meeting, (their form of a worship service).
And every year the Church switches out what is being taught in the Relief Society or Priesthood meetings as well as the Sunday school classes. The Church dictates what is taught and doesn’t allow any teaching from outside resources to be used whatsoever. Teachers are mandated to only use authorized material supplied by the Church, meaning no history books, no newspapers, internet, et al.
