We here at Cato’s Center for Educational Freedom spend a lot of time just trying to help people get their facts straight. You know, providing information that clearly shows that government schools are not the foundation of American democracy, or itemizing programs to show that school choice is not a political failure. That sort of thing.

Well, a new study in the journal Education Next demonstrates why just getting people solid information is so important: When the public has just a few basic facts about such things as public school expenditures or teacher salaries, support for heaping more dough on our sinkhole public schools takes a pretty big dip.

On spending, investigators William G. Howell and Martin R. West found that people provided with actual per-pupil expenditure data for their districts were significantly less likely to support increased spending, or to think that increased spending would improve student learning, than were respondents not given such data. Only 51 percent of respondents informed about actual outlays thought spending should be increased, versus 61 percent of uninformed respondents, and only 55 percent of informed respondents were confident that more spending would improve student learning (versus 60 percent of uninformed). Those levels are still way too high in light of the at-best very weak correlation between spending and achievement, but they do show that when people have good data to go on they tend to approach spending more rationally.

How about teacher salaries? Unfortunately, Howell and West didn’t inform respondents about teacher pay using hourly earnings, which in light of the relatively small number of hours teachers work is the fairest way to judge how well they are paid. The effect of knowing even annual salaries, however, is telling: While 69 percent of uninformed respondents supported increasing educator salaries, only 55 percent of informed people thought teacher salaries should be bolstered.

So when it comes to American education, it seems a little knowledge, far from being a dangerous thing, can be a pretty big step in the right direction.