A Proven Method

OSL has been refined for over 25 years to maximize impact on individuals. Discover what OSL is and what makes it so effective.

Transforming Lives

Hear how OSL has transformed lives of both life-long believers and new believers.

Used Worldwide

OSL is being used across the globe. Find OSL in a local church near you!

What other pastors and leaders are saying about OSL

Dr. Leslie KeegelPresident of Foursquare Sri Lanka
We have wanted a good discipleship program and the best we have come up with is OSL...
Val ChavesNational Leader of Foursquare Philippines
OSL has started to grip the hearts of those who went through the training. They are growing in their relationship with the Lord and getting more involved in the work of the Lord. More OSL training are now being planned by our coordinators. Thanks to Pastor Jerry Dirmann for sharing OSL with us!
OSL Director: Jennifer Ortiz
Rohi Christian Church San Jose, CA
“OSL is the BEST discipleship tool we have ever seen. This program is a solid, biblical tool that the Holy Spirit is using to destroy the work of the enemy in people’s lives. Our church is more mature, more free, and more able to move in God’s power because of what we have learned in OSL. We love it!”

Sr. Pastor: John Wiley
The River Raytown, MO
“Today our church members are inviting new people
 to attend our church at a rate we’ve never seen before. We are seeing people with lifelong struggles set free by means of the biblical truths in OSL. Our children’s ministry does not have a single opening for service because OSL students have filled every available slot.”