
Practice your voice
be strong and not loud
do not yell/keep it conversational
Emily,
All great ideas. I too come from an acting background & another great exercise is to practice breathing from the diaphram (sp?). This is actually deeper breathing & will help you sustain your breath, tone & volume longer.
The best way to feel this is lie on your back & take deep breaths. You will automatically breath from the diaphram.
I'm always working on voice, because it is not particularly a strength of mine. In fact, a few years ago I did a few sessions of vocal coaching from an actor, in order to learn how to better project and direct my voice. I speak quietly on day-to-day basis.
One helpful exercise she gave me was to imagine you are 'throwing' your voice to a point at the back of the room. You can focus on 'reaching' that point.
Obviously, the other part of vocal control is breathing. I've heard that singing and swimming are both good ways to gain more lung capacity, which I definitely need.
I find that an appropriate change in inflection can be good for both the students and the instructor. One can also use it to emphasize certain points, and it also reduces the likelihood of student mental fatigue.