Nadh, You can use the same pace of delivery, just have some activity every 15-20 minutes to change the pace and flow of the class. For example you can lecture for 15-18 minutes and then pause for questions. Do another lecture and then have a group discussion. The change of pace doesn't have to be major just something that will let the students refocus and reset their brains a little so they can concentrate on something else and then go back to the content. Also, these discussions help them to see the relevancy and application of the content. Gary