A cursory Google search shows that negative numbers are introduced in 4th-6th grade. For me, I only remember that particular instance of shadow day and just rem

A cursory Google search shows that negative numbers are introduced in 4th-6th grade. For me, I only remember that particular instance of shadow day and just remember it seeming novel at the time (in terms of it being taught). I actually don't have much recollection when things were introduced outside of that until later in junior high or high school. If I remember right, it was specifically about negative numbers, and from what I recall it was me thinking that it was just subtraction or something along those lines.