Well, keep in mind that you may conduct each session in its entire sequence or skip over sessions that you feel the participants may have knowledge of or may come back to later.
For example; instead of starting with the first session "What is Abuse" you may want to consider starting off with the "Peace of Abstinence" session first and use it as a reference base as to why abstinence is a smart choice as appose to some danger consequences associated with dating.
Also keep in mind that the guide is a tool and you are the master of the tool. It's objective is to be utilize as an educational guide that helps YOU simulate conversations regarding topics provided in the guide. You can determine the time frame of each session by controlling the discussions.
Duration of each session typically is recommended for two hours. However, a session duration is determined by YOU and can go on as long as you want. Also, scheduling is determined by your availability and other factors.