What PMotlhabane suggests might help a lot.
In my experience, however, I have noticed that when students are engaged in the process they seem to be more active. So as you teach them, allow them to participate, and be active. Also, it is important to bring fun into the classroom, by introducing some games and activities that make studying seem more fun and less work. Ask your students to the board more often, don't just let them sit at their desks. Make them move around the class as they play a new vocabulary game, and act along with them. You don't necessarily need to be in a teacher-student relationship, make it more friendly and relaxed.
Here are some ideas for class activities, and games you can use to make your teaching more lively:
Hope this helps.