Are you referring to these? https://en.wikipedia.org/wiki/New_Math https://en.wikipedia.org/wiki/New_Math https://en.wikipedia.org/wiki/Secondary_School_Mathe

Are you referring to these? https://en.wikipedia.org/wiki/New_Math https://en.wikipedia.org/wiki/New_Math https://en.wikipedia.org/wiki/Secondary_School_Mathematics_Curriculum_Improvement_Study https://en.wikipedia.org/wiki/Secondary_School_Mathematics_C... I'm not in the US, but both of those seem to be greatly focused on the curriculum. OP is instead talking about the style of teaching and learning, which could be applied to practically any curriculum.