Have some friends who moved out there last summer. They started their kids in the public schools there, which I believe was Leander Middle and Leander High. After Christmas, they pulled their kids from those schools and moved them to Lago Vista, where they own a lakehouse. Apparently they thought the Leander schools were less than desirable.
Leander ISD overall is highly regarded. It is a pretty large school district which includes Cedar Park, Steiner Ranch, etc. The Leander public schools are probably the lower end of schools in the district.