Nice easy one for you guys. What ages correspond to what grades in the US school system?

I’ll be watching a film and someone will say “That’s when we were in the 7th grade” or something and I’m never quite sure what ages they are talking about. So starting at grade 1 and going up to the end of high school can someone fill me in on what ages they are meant to be. Feel free to break them up into the school groups, i.e. junior, middle, high etc.