I think CLE 8th grade has measurement-assuming the student already has an understanding of the basics with like how many inches are in a yard.
It’s difficult to look at little samples on my phone and try to compare to the keys. But, Looking at CLE at the 8th grade level would be all the things that the keys has. Fractions, decimals, decimals/percents, metric conversions ( conversions I don’t think are super in depth with the keys) volume/measurement, geometry, and algebra. CLE starts out learning algebra in book 1. The 8th grade level is preparing for all math needed to complete high school course work. This is what I think the keys would also do.
As far as comparing the keys to Algebra and the CLE algebra I’m not sure how it compares, it’s hard to tell. I really need to comb through them side by side. I’m curious to know what’s missing from the keys algebra and if it’s possible to add to the keys to get the full algebra 1 depth.
One suggestion was to not do the keys to algebra and just move into an algebra 1 curriculum.
CLE is suppose to be lighter, but given that she would not have done any algebra and they introduce it in the 8th grade, it makes me think that she would also need that introduction before algebra 1. Now if CLE is very comparable to the keys maybe it’s possible.
There is a difference in maybe how info is presented and they are spiral which hasn’t been a good fit for DD in the past. I need to learn more about it