1) Powerful presentations require both visual and audio elements to engage students of all learning styles. Visual technologies like overhead projectors, digital projectors, and document cameras can display images, videos, and real objects. 2) Non-projected visuals such as flipcharts, magnetic boards, felt boards, chalkboards, and whiteboards provide additional presentation tools. Common video formats include broadcast, narrowcast, and cablecast. 3) When creating presentations, consider your audience, stay focused on the topic, use visuals appropriately, appear confident and comfortable, and add humor when possible. References are provided for further information.