Three randomly chosen districts out of tens of thousands prove little. Looking at wider statistics instead of small anecdote, we see that in addition to lagging behind countries the US outspends on education, greatly increased spending has had no benefits even within its borders:

Since 1970, inflation adjusted public school spending has more than doubled. Over the same period, achievement of students at the end of high school has stagnated according to the Department of Education’s own long term National Assessment of Educational Progress [I encourage you to visit the website for the illuminating graph of inflation adjusted per-pupil spending and test scores vs. time] - https://mjperry.blogspot.com/2009/09/education-spending-doub...