This is almost word by word what I was taught about OOP in Introduction to Programming back in 89. We used Modula-2, but it was already easy to connect with the

This is almost word by word what I was taught about OOP in Introduction to Programming back in 89. We used Modula-2, but it was already easy to connect with the way we had been writing games in assembler. Later on, languages built for OOP like C++ or Java, with all the complexity and new features, shifted the focus of teaching programming from the problem domain (what I need my code to solve) to the language domain (what code I can write), and then Patterns arrived, and things quickly got hairy and over-engineered and big.