Doing unit conversions where the units are treated as a kind of that can be multiplied and cancelled was a game changer for me. When it was first taught to me,

Doing unit conversions where the units are treated as a kind of that can be multiplied and cancelled was a game changer for me. When it was first taught to me, I thought it was pointless. Looking back, it should have been taught closer to 1st grade, not 7th.