I have heard of some cases of Fuel being adapted for a classroom, especially for an Old Testament or New Testament survey. There are 48 sessions per Testament, so depending on your school schedule, you could cover one or two sessions a week for two years, or two or three a week for a year.
As far as the format of the curriculum itself goes, the core teaching plan is mainly based on discussion questions, which would work well in a classroom. There is a listening guide (fill-in-the-blanks) for each session's video. Since the teaching plans are designed with a 60-minute session in mind, you would need to add to the questions and activities. If you already have a curriculum plan in place, Fuel could possibly be used to supplement the plans you already have.
LifeWay Community 
