Hey look, a rare opportunity to complain about my home state on HN on two consecutive days! There is a similar school in Oklahoma called the Oklahoma School of Science and Mathematics. The legislature founded the school in 1990 and has been systematically trying to defund it ever since[1].

IMSA and OSSM were founded around the same time, are of similar size, history, and philosophy. They are also both members of amazingly-named National Consortium for Specialized Secondary Schools of Mathematics, Science and Technology. If you're looking for a school like this in your area, you should start there[2].

1: http://www.reddirtreport.com/red-dirt-news/ossm-only-adequat...

2: https://en.wikipedia.org/wiki/National_Consortium_for_Specia...