Teasley entered the ministry of the Church of God denomination in 1896, and pastored in New York. Sometime after 1910, he became General Manager of the Gospel Trumpet Company, where he worked until 1917. His works include:
- Historical Geography of the Bible, 1898, 1917
- The Holy Spirit and Other Spirits, 1904
- How to Conduct a Sunday School, 1911
- The Gospel Guide-book, 1918
- The Bible and How to Interpret It, 1918
Lyrics
- At the Cross of Jesus Bowing
- Back to the Blessèd Old Bible
- Be Ready When He Comes
- I Am the Lord’s
- I Know in My Heart What It Means
- I Will Praise Him, Hallelujah!
- In Holy Reverence, Lord
- Song of Joy, A
- We’ll Crown Him Lord of All
- We’ll Praise the Lord
Music
- No Friend Like Jesus
- Reverena