Webin 1st grade students are 6 or 7 years old. And at the end of elementary school in 5th grade, students are 10 or 11 years old. At the start of middle school, students in 6th. Webon average, a 3rd grader is usually around 8 to 9 years old. Now, of course, there can be slight variations depending on when a child’s birthday falls, but this age range is generally applicable across the united states. Webthe simple answer here is that 3rd graders are 8 to 9 years old. However…