But it seems like childhood reading scores were pretty much flat between 1983 and 2006, when the show was on the air: they only varied by 10-15 points on a 500 point scale[1], and there was no clear upward trend, it just sort of fluctuated. Reading for pleasure has never been lower among kids, either[2]. It doesn't seem to me that the mission of the show was achieved, if the mission was to make children read more books, and understand them more.
Ultimately I think it ended up just being a pleasurable way to have kids get distracted by a friendly, positive TV show. My guess is that if you want to improve reading scores and habits, parents have to do more than just turn the dial to PBS.
[1] https://www.nationsreportcard.gov/ltt/?age=9
[2] https://www.pewresearch.org/short-reads/2021/11/12/among-man...