Aligned with standards, this extremely thorough PowerPoint includes plenty of visual aids (maps, pictures, primary documents) to help lower students, ELLs, and help stretch understanding for gifted students.
Most slides have multiple layers, so slide count is not representative of quantity.
Multiple opportunities within the PowerPoint to stop and talk about the topics, using primary documents to start discussions. Plenty of political cartoons to analyze, too.
A couple of solid graphic organizers for kids to copy down from it as you talk about the subjects.
Presentation and activities within can go for as long as you need to. I used this to take up a week. (45 minute periods)
Powerpoint goes over all long-term factors and short term causes of the Civil War. My students showed some serious growth on their assessment.
The last slide goes with a Jefferson Davis Inaugural speech handout I am putting on here. Feel free to leave out if you want.