This is a basic list of what is covered in 1st Grade Social Studies. It is was is covered nation wide but it is not mandatory. Feel free to use this list for your own use while creating your own curriculum. Here is the Printable too.

Rights and Responsibilities of citizenship

Places and people in different times
Every day life in different times and places

U.S Symbols, icons, and traditions

Background of American citizens

Basic economic concept

My state