Do your students write "123 Main St Chicago IL" instead of "123 Main St, Chicago, IL"? Do they forget the comma between the street and city – or between the city and state? Do they put commas everywhere… or nowhere at all? You're not alone. Commas in addresses is one of those grammar rules that seems simple – until students start writing. Third graders often forget the first comma, add an extra comma after the state, or leave out both commas completely. Without explicit practice, this mistake sh