School's implementation of CC in the middle school years appears really variable.
The party line in our district is that CC8 is a lot of former algebra I topics, and Alg I is now more like an in depth Alg I + some Alg II topics.
Part of how you can see how the school implements everything is to look at high the high school sequences have changed. In our school, they're requiring every student do all of 6, 7, and 8 (though there are a few compaction options), then Algebra I, Geometry, Alg II, precalc, calc. Before they had an extra "functions" class before precalc, which seemed to make up for the thin coverage of algebra topics in I and II. (Which, I note, puts up back to the sequence I went through in the 80s....)
Search the forum for dozens of threads on common core, algebra, and middle school. It's been an issue for a while, and schools appear to present changes rather opaquely.