We are on lesson 9 of 106 Days of Creation and I am having a hard time.
I'm not a science person. An example of how I am struggling is lesson 8. It says, "Explain that rainbows - and all color - are possible only because of light..." How am I supposed to explain that when I don't know anything about it or understand it? I don't see anything that says where I'm supposed to find that information. This has happened more than once. My children are getting pretty frustrated because of this as am I. Am I missing something or is it expected that the teacher will know about these things? I looked in my Handbook of Nature Study and didn't see anything that would help me.
Now, if the answer to my question is that I have to have foreknowledge about science, is there another science program that we could use that is similar (using living books but having a general overall plan for presenting science) for a K and 4th grader that doesn't require knowledge? 
Thank you!