Once a correspondence student has completed their course, they need to be discipled one-on-one by a mature Christian. Jesus himself was a discipler, as was Paul.
As with any newborn, years of parenting (discipling) is absolutely necessary for them to grow. The purpose of the correspondence course in John & Romans is to learn to love Jesus and His Word. They will then need to be discipled in other aspects and doctrines of the Word and Christian life.
We have provided a great potential discipleship program that has been used all over the world. A mature Christian needs to take a new Christian under his/her wing, and prayerfully and faithfully disciple and train them for their new life in Christ. Most successful Christians can trace their success to someone who properly discipled them.