It does seem neat, yep! It looks like it's based on a format called PreTeXt[1], and the interactive exercises (Q&A) are implemented using an extension called W

It does seem neat, yep! It looks like it's based on a format called PreTeXt[1], and the interactive exercises (Q&A) are implemented using an extension called WeBWorK. [1] - https://pretextbook.org/examples.html https://pretextbook.org/examples.html