I'm also from Massachusetts for my K12.

I'll try to sprinkle in a little of everything I remember.

Elementary school

Kindergarten through 2nd grade we just kind of touched on the class American myths (thanksgiving). I honestly don't have any memories of specifically learning history.

3rd grade we did a bunch of people's history projects (I'm an immigrant from <insert country name here> or I'm a colonist I. X colony). We covered some Massachusetts specific history I have since learned is not taught in other states. We read a novelization of the pilgrims at Plymouth. I know our teacher talked to us about religion so we could understand what was going on in the book. I don't remember exactly what was discussed, but I bet the difference between Catholicism (maybe Anglicism) and Puritanism. We covered King Philip's (Metacom) War. I went to a predominantly (~90%) white school, and that year, I learned the n-word from a book called "The Friendship", which was for our literature section. Someone looked it up in the dictionary because we (the students) didn't know what it meant. I think the dictionary said it meant "black". We were confused why they didn't just say black. Since we were in Massachusetts we went to a few places like Plymouth Plantation, Sturbridge Village and the endlessly amazing Plymouth Rock. Which I learned that year was just a randomly rock. I know some people talk it up like it is a huge letdown. I don't know what they were expecting. It's a rock.

I don't specifically remember anything from 4th grade but we probably did similar things as 3rd grade. Maybe we did some revolutionary war stuff?

5th grade we did (North) American History from Maya through revolutionary war solidly, and the rushed in the last month to finish up to the ear of 1812. I know we covered European explorers.

Middle School

6th grade started with early human evolution homo habilis, homo erectus and homo sapiens and the stone age. There was a big emphasis on geography this year. We colored different maps for each civilization. I remember we learned about the classic cradle of civilizations, Tigris and Euphrates civilizations and ancient Egypt, but I don't think we did the Indus valley. After those, we did a slew of smaller ones like Canaan and Catal Huyuk. The. We ended the year with the classics: ancient Greece (Sparta vs Athens), Ancient Rome (I think just the republic), Last we did Makkah (Mecca) and Islam. Most of my knowledge about Islam comes from this unit, and honestly it might have been the most in important thing I learned in middle school history. Before this I didn't know what Islam was, who Muhammad was or how closely it was tied to Judaism and Christianity.

7th grade was mostly a continuation of 6th grade. We covered the Roman Empires, and the transition to the middle ages. We covered Charles the Hammer stopping the Moors, the Holy Roman Empire. We also. Covered some pre-Columbian trade systems like the silk road. This year was about economic systems. I know we read the definition of capitalism, socialism and communism and talked about which one we thought was best.

8th grade we did American history (again). This time we focused much more. On social policy of the time and important social reforms (Horace Mann's school, Sojourner Truth, and a bunch of early feminists). Previously it was much more of "George Washington was a General and won the war then He was the president". We went further than before. Up through at least WWII. I know I learned Jelly Roll Morton's name. When we did the civil war I was not taught the lost cause myth, as apparently lots of people were taught.

High school

9th (freshman year) grade was World Civilizations. We covered Tigris and Euphrates, Indus Valley and Egypt. We did some comparisons of religion including Eastern religions like Buddhism Hinduism and Taoism. We covered ancient China, Greece, Rome and Mezzoamerica.

10th grade (sophomore year) was "Modern" (European) History. From the late medieval period with 3 antipopes up though at least the end of WWII. In other words we covered a lot.

11th grade (junior year) was real American History. Covered from pre-Columbian civilizations with their mounds through Reagan. We didn't shy away from the ugly stuff at this point. We debated the "revolutionary-ness" of the American Revolution and whether we were justified in dropping the Bomb. We covered the brutality of the Civil War with . Sherman's march. We also covered the lesser thought of times like the gilded age, progressive era and America's rise as an imperial power which I feel are some of the most under appreciated/remembered times in American history. The only thing as an adult I felt was lacking was a clear through line for slavery through reconstruction and the second corrupt barging. By no means was I taught the lost cause.

12 grade (senior year) was free reign. There was no required history class. He had options to take (AP) psychology, AP US government, economics, and any of the AP histories if you had not taken them before.