The Pharo MOOC is great. It was my introduction Smalltalk-style OOP programming. The focus of the small project along the course is web development using Pharo,

The Pharo MOOC is great. It was my introduction Smalltalk-style OOP programming. The focus of the small project along the course is web development using Pharo, but I hope they eventually create a version geared towards data science using PolyMath and Roassal. Pharo reminds me of that famous William Gibson quote: "The future is already here—It’s just not very evenly distributed". See https://mooc.pharo.org/ https://mooc.pharo.org/ and also https://books.pharo.org/ https://books.pharo.org/