The online Nevada Connections Academy charter school is staging a legal fight against the threat of closure, pushing back after the State Public Charter School Authority flagged it for a low graduation rate.

The school is one of two in Las Vegas that the charter authority could close at the end of this academic year because of graduation rates below 60 percent.

Both Nevada Connections Academy and Beacon Academy of Nevada offer online courses, with 2015 graduation rates at roughly 36 and 53 percent, respectively. Those rates slightly increased to 37 and 55 percent this year.

At issue is the state’s ability to take over the school or replace its board of directors.

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