HTS is a member of American Tamil Academy (ATA) and a non profitable organization. Accordingly, it is following ATA syllabus and its books for Mazhalai to Level 3. For higher levels, however, HTS uses its own books. There are five branches in the Houston area:

Pearland Tamil School
Katy Tamil School
The Woodlands Tamil School
West Houston (Westheimer) Tamil School
Cypress Tamil School
Sugar Land Tamil School
West Katy Tamil School
A total of over 450 students are currently (Academic year 2016-17) enrolled in these three schools. Tamil is taught in seven levels (grades) starting from Kinder Garden to Level 7.

There are over sixty voluntary teachers are involved in teaching Tamil. Alongside of these teachers there are several volunteers helping to run the schools as coordinators, treasurers, secretaries, committee members, etc. Without these volunteers, it is difficult to run the schools. HTS is accredited Tamil School by AdvancED.