The following is a series of presentation by John Piper from the Desiring God website.
It is a great resource for Bible reading and interpretation for all Christians old and young alike.
I hope you find it as encouraging as I have.
"He gave some as apostles, prophets, evangelists, pastors and teachers, for the equipping of the saints for the work of service, to the building up of the body of Christ" (Ephesians 4:11-12).
Bible Interpretation by John Piper