Suggestions for refreshing on data science

It's been a few years since I took my courses in Data Science (at my University), and I want to refresh. I haven't worked on Kaggle before, but that seems to be the place to go for doing this work in ways I can demonstrate my skills to future employers / teams / etc.

I was thinking of going through The Elements and applying the tools they go over to some simple datasets; e.g. MNIST, Titanic, etc. Then I could …

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