Student–teacher ratio
![Correlation between class size and reading performance from the results of the U.S. National Assessment of Educational Progress reading tests given in 2005 to 4th and 8th graders](/Images/godic/202502/13/US_correlation_between_class_size_and_reading_performance3605.png")
Student–teacher ratio or student–faculty ratio is the number of students who attend a school or university divided by the number of teachers in the institution. For example, a student–teacher ratio of 10:1 indicates that there are 10 students for every one teacher. The term can also be reversed to create a teacher–student ratio.