In the US, teacher to student ratios are generally not fixed. One wchool may have 25 to a class. Another 35. If you can select only high performing students wi

In the US, teacher to student ratios are generally not fixed. One wchool may have 25 to a class. Another 35. If you can select only high performing students with fewer individual needs, you can increase the number of students without needing additional staff. Likewise, you can higher fewer or no language teachers, special education teachers, etc.