What follows is an an organized and curated list of content. Click here for an exhaustive list of content on 1 John
Kenneth Boa: 74. 1 John  Part of the series: Visual Survey of the Bible.
Bill McRae: 48. 1 John, 2 John and 3 John 
Mark Dever: Christianity and the Flesh – The Message of 1 John  Capitol Hill Baptist Church.
Ray Stedman: First John: The Fruit of Fellowship with Christ [, Translated] Part of the series: Adventuring through the Bible. Peninsula Bible Church. Spanish translation available.
John MacArthur: 1 John [, ] 42 lessons.
Steven J. Cole: 1 John [, ] 25 lessons.
Mark Dever: Basic Questions  Capitol Hill Baptist Church. 5 lessons.
Mark Driscoll: Epistles of John  Mars Hill Church. 12 lessons.
S. Lewis Johnson: 1st. 2nd, & 3rd John [, ] 26 lessons. Believers Chapel.
John Piper: Let Us Walk in the Light: 1 John  14 lessons.
Ray Stedman: Maintaining Fellowship  10 lessons. Part 1 of 5. 1 John 1:1-2:17. Peninsula Bible Church.
Ray Stedman: Maintaining Truth  6 lessons. 1 John 2:18-28. Part 2 of 5. Peninsula Bible Church.
Ray Stedman: Maintaining Righteousness  7 lessons. 1 John 2:29-3:10. Part 3 of 5. Peninsula Bible Church.
Ray Stedman: Maintaining Love  8 lessons. 1 John 3:11-4:21. Part 4 of 5. Peninsula Bible Church.
Ray Stedman: Maintaining Assurance  5 lessons. 1 John 5:1-21. Part 5 of 5. Peninsula Bible Church.
W. Hall Harris III: 1, 2, 3 John Comfort and Counsel for a Church in Crisis [, Technical] 14 lessons.
Charles T. Buntin: The Circle of Faith 
W. Hall Harris III: An Out-of-this-World Experience: A Look at "κόσμος" in the Johannine Literature [, Technical]
Sung Jin Park: Thematic-Structural Analysis Of 1 John 3:6, 9, 5:18 for the Problem Of Sinlessness [, Technical]
Mark Stevenson: Overcoming Temptation with the Word (1 John 2:12-14) 
Daniel B. Wallace: Honest to God! Or, God is not a Pit Stop (1 John 1:5-10) 
The Textual Problem in 1 John 5:7-8 [, Technical]
The Comma Johanneum and Cyprian [, Technical]
Study Helps and related
Tom Constable: Tom Constable’s Expository Notes on 1 John  This is also available in the Net.Bible.org Study Environment.
David Malick: An Introduction To The Book Of 1 John 
Jeffrey E. Miller: 1 John: A Synthetic Look  7 lessons.
J. Hampton Keathley, III: 5. The Non-Pauline Epistles 
Daniel B. Wallace: 23. 1 John: Introduction, Argument, and Outline