The Church of Jesus Christ of Latter Day Saints teaches children that Christ is their redeemer by explaining that he suffered and atoned for their sins. The church believes that Christ saves believers from physical death through resurrection.
Teachers can help LDS children understand that Christ is their redeemer by discussing what happened in the Garden of Gethsemane. Matthew chapter 26 discusses that Christ loved people so much that he was willing to suffer and die for their sins. The LDS church believes that people must repent of their sins, be baptized into the church and keep their baptismal covenants in order for Christ to forgive their sins and redeem them. The church's third Article of Faith declares that all mankind can be saved through Christ's atonement if they are obedient to the gospel.
The Bible discusses reasons why Christ is the redeemer, and teachers can simplify the verses for children. Matthew chapter 16 verse 21 states that Christ's sacrifice was necessary for people's salvation, and First John chapter 1 verse 7 discusses that Christ cleanses people's sins if they repent. The LDS church also believes in the teachings of Ephesians chapter 1 verse 10, which declares that Christ will return to the earth.