This is something we're striving hard to do at the startup I'm involved with (end-to-end resources for learning machine learning, with just high school math background assumed).
In our Data Scientist Track (https://www.dataquest.io/path/data-scientist?), I specifically focused on teaching K-nearest neighbors first b/c it has minimal math but you can still teach ML concepts like cross-validation, and then I wrote Linear Algebra and Calculus courses before diving into Linear Regression.
