 In 1988, the 35 schools of ISAS had a combined enrollment of 16,895.In 1992 the same 35 schools had a combined enrollment of 18,504.The greater Houston area is home to a large homeschooling community with an estimated 40 to 50 thousand homeschooled students, based on 300,000 homeschool students in Texas and 2.04 million in the U.S. Over 100 organizations, support groups, and co-ops provide classes and resources for homeschool families.