preparing the lectures

I have now prepared the first 6 lectures. It takes me approximately 4-6 hours for each lecture; this includes

• brainstorming
• reading the textbook
• searching for articles from the education literature about what students have most trouble with
  
• storyboarding the layout of the lectures, i.e. what the 14-16 powerpoint slides will each be about
• creating the clicker questions
• filling in each powerpoint

I enjoy the process, but worry about the rate at which I am getting them done. I wanted to be half-way through the course in prep by the start of semester, which would be 20-21 lectures finished