Here is an audio series that Dr. McLain presented at Northside Bible Church from March 3 through December 8, 1885 on The Acts of the Apostles. This chapter by chapter study covers 32 lessons on Acts which is crucial to your understanding of right division. This study was given after Dr. McLain published the book "Rethinking the Acts" in 1984. Acts is such a crucial book to understand the transition of God's plan of salvation from the Jew to the Gentile.
This lesson was taught by Dr. McLain on March 3, 1985. The scripture is Acts 1:1-3 KJV: "1 The former treatise have I made, O Theophilus, of all that Jesus began both to do and teach, 2 Until the day in which he was taken up, after that he through the Holy Ghost had given commandments unto the apostles whom he had chosen: 3 To whom also he shewed himself alive after his passion by many infallible proofs, being seen of them forty days, and speaking of the things pertaining to the kingdom of God:"