Since the time I've graduated high school, every calling I've had has dealt with teaching in some way.
First, I was a Primary teacher for the summer in my home ward. I taught the 8-turning-9-year-old's, and I really enjoyed it. I team-taught with my old Young Men's leader. It was a new experience for me, trying to adjust teaching to younger kids. I miss my class, and love it when I still see them now. They'll be Deacons and Beehives this year!
Next, I was called to be an instructor in Elders Quorum in my Young Single Adult ward. I was pretty scared at first, but over time I came to enjoy it as well. I learned a lot and really established my "base line"for how I teach.
The next year, I was a Gospel Doctrine teacher. I still remember the day when I met with my Bishop and he extended the call. That calling, especially teaching the Old Testament, was "the one calling I never wanted." When he first said it, it took all I had to not laugh in his face. I never wanted to teach Gospel Doctrine, and I told him that. But I accepted. Honestly, once I started teaching, I didn't know what I was afraid of. Over time, I started looking forward to teaching.
This year, I'm a ward missionary, and with that comes teaching Gospel Principles every so often. Just can't get away from teaching, I guess. It's a good thing I love teaching, now.
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Over time, I learned quite a bit of what you should and shouldn't do as a teacher. After church today, I felt inspired to share what I know after listening to a talk (which was a good one, for the most part) that had a few of the "Don'ts" listed below. I'm not sharing these lists because I want to brag about all my cool teaching moments- that's not my intention. I share this because I want what I've learned to help you.
Don't...
Tell the story of how you got your topic. We all have been called by a member of the Bishopric, we assume that you got a phone call as well.
Give excuses about your lack of prep. "I only had a day to prepare this" is not a good way to start your lesson or talk. It's an invitation for those hearing your talk to pull out their phones, take a quick nap, or do anything but pay attention to you. If you're not as prepared as you'd like to be, they don't have to know. Be confident- fake it 'til ya make it.
Keep mentioning the time/stuff you won't have time for. "I only have ten minutes, so..." or "I have four more topics I want to cover, but I won't be able to." Once again, you don't need to let them know your entire outline.
Be afraid to go off the outline. If the lesson goes one way, go with it. Most of the time, it's the Spirit guiding your lesson in the direction it should go. You could be an answer to someone's prayer. So listen!
Ask no-brainer questions. Make sure questions are deep enough. Simple yes/no questions aren't the best if you're trying to get interaction.
Be afraid of awkward silences. Embrace it. Someone will speak up eventually! One time after I taught a lesson, a member of the Bishopric came up to me and said, "That was a great lesson! But you need to give more time for your class to answer. Don't be afraid to just let it be silent."
Look away from someone while they're talking. If you're using the time people are talking to prepare for the portion or something like that, you're doing it wrong. People like to know their comments are appreciated. So, make sure you are listening to the comment being made.
Do...
Testify. One of the most important moments in my time as a teacher in the Church have been those moments when I can testify of eternal truths. One time, my uncle and cousin came to my Gospel Doctrine class because they were in town. At the end of the lesson, they said they were impressed that I "was able to testify at important times during the lesson, and thus making an easy transition for other members in the class to comment and testify." Testifying more than once should be your goal for the lesson.
Take your calling seriously. In Teaching, No Greater Call (which everyone should look at, by the way), a resource for teachers from The Church of Jesus Christ of Latter-day Saints, it says: "As you think of the role of gospel teaching in the salvation and exaltation of God's children, can you imagine a duty more noble or sacred?" Not to scare you, but teaching is a pretty big responsibility. So take it seriously.
Make it a discussion rather than a lecture. Unless you're speaking in Sacrament Meeting. Otherwise, leading a discussion helps the class to interact, give to the lesson, and make the lesson better than anything just the teacher could contribute. My favorite lessons have been ones when people comment and contribute immensely- not because I don't want to talk as much (because I can talk forever), but because I love hearing examples that one person has that others might not have.
If you teach Elders Quorum or Relief Society, check out the teaching helps at the end of each lesson in the Teachings of the Presidents books. They're really cool. And I've used them.
Pray for the Spirit. I would be sorely mistaken if I thought that I could get through an entire lesson without the Spirit- at least a lesson where hearts are touched. The Spirit knows exactly which way the conversation should go, so pray hard that He can be there when you teach. Your lesson can go so much better.
Invite the Spirit. This relates to the last point. Sometimes in Sunday School we didn't sing an opening song, but I loved having one, because it really set the spiritual mood. Invite your class to be open to the Spirit, because what they get out of the lesson/talk is entirely up to them.
Enjoy your calling. If teaching is scary, find a way around that. Gospel Doctrine Teacher was "that one calling I never want." I laughed a little when my Bishop extended the call to me, but honestly, it turned into one of my favorite callings, ever. Just like everything else in life, if you aren't enjoying it, change something.
Keep running.