Watch this series of videos by Trevin Wax on the power of gospel-centered teaching in Bible study. He reminds viewers: Don’t rush so quickly to application that you miss the gospel. He also addresses teaching the gospel to kids, presenting distinctively Christian material, and going deeper with your teaching.
http://vimeo.com/album/2595711/video/78571020
For more on the topic, check out the resource Gospel-Centered Teaching.