TEKS stands for Texas Essential Knowledge and Skills. They are the academic standards used in every Texas public school and most charter schools, kindergarten through 12th grade. TEKS covers math, ELA, science, social studies, fine arts, health, and other subjects — a wider scope than Common Core, which only covers math and ELA.
The big picture: Texas does not use Common Core. TEKS is the Texas version of "what kids learn at each grade". The Texas STAAR test measures TEKS mastery. Most kindergarten and 1st grade content overlaps with Common Core foundational skills (counting, phonics, addition), with some Texas-specific items like early financial literacy.
