What happened to all the old material. I was going to watch the Exploring the Universe: Crash Course Big History #2 but I can't find it or the questions in the curriculum anymore. I am finding a lot of what I used before is gone. I have done searches etc. and nothing. Yes, I know i can still find the video on YouTube, but it was very helpful to have the question and answer key provided here. Any way to get some of the old lessons?
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