[j_walter]

Sure, a class size of 35 is a problem. So are a lot of factors that can lead to kids not learning. However the city I currently live in has a 20:1 ratio...and there are plenty of kids not succeeding (better than average though). Another local school in Portland has a ratio of 19:1...and they are 22% proficient in math. Thornwood HS in Chicago...13:1 ratio, but 8% proficient in math. It's not always about staffing...

[fatbird]

Staffing is a pipeline problem: a good ratio might not help a particular issue, but you'll never be able to address those issues without it.

[j_walter]

To what end though...I'm sure 1:1 ratio would be a huge improvement, but at what cost. You always get diminishing returns in these cases which seems heartless...but like with anything there is only so many resources to go around.