Pathfinders/Adventurers
A great way to integrate new families and students into the church is through Pathfinders and Adventurers. Both Pathfinders and Adventurers teach young people about Jesus and have been proven to help in the retention of young people in the faith. Also, many people are familiar with Girl/Boy Scouts, so one could introduce these clubs by comparing the similarities.
Here is an excellent resource on Adventurers: https://youth.adventist.org/Ministries/Adventurers
Here is an excellent resource for Pathfinders: https://youth.adventist.org/Ministries/Pathfinders