I served as Scout Master and then as an Assistant Scout Master for a bunch of years. During this time I taught some classes, and created some presentation files for them. These are some of the better ones. I hope they help you on your way to prepping for your own classes. They were all originally created in Keynote, and have fancier animations etc there.
Potions/Cooking Merit Badge Presentation
Chess Merit Badge Presentation.key
Chess Merit Badge Presentation.pptx
Computer Programming Merit Badge Presentation.key
Computer Programming Merit Badge Presentation.pptx
Oath Law and Outdoor Code Slides 14×9 Presentation.pptx
Oath Law and Outdoor Code Slides Presentation.pptx
First Class Weather and Emergency Presentation.key
First Class Weather and Emergency Presentation.pptx