Science (UIL test) Individual (Chemistry) Individual (Chemistry)

| School_Year | Class_A | Class_AA | Class_AAA | Class_AAAA |
|---|---|---|---|---|
| 1985-86 | Bronte | Liberty Hill | Slaton | Austin Westlake |
| 1986-87 | Lindsay | Liberty Hill | Slaton | Cedar Hill |
| 1987-88 | Happy | Clifton | Lampasas | Cedar Hill |
| 1988-89 | Plains | Abernathy | Lampasas | McKinney |
| 1989-90 | Valley Mills | Van Alstyne | Bishop | Highland Park |
| 1990-91 | Valley Mills | Canadian | Abilene Wylie | (tie) Carthage/Kerrville Tivy |
| 1991-92 | Valley Mills | Canadian | Troy | Highland Park |
| 1992-93 | Vega | Canadian | Dripping Springs | Kingsville |
| 1993-94 | Lindsay | Stinnett West Texas | Bridgeport | Corpus Christi Flour Bluff |
| 1994-95 | Lindsay | Stinnett West Texas | Bridgeport | Mesquite Poteet |
| 1995-96 | Rule | Franklin | Kirbyville | Austin Johnson |
| 1996-97 | Moulton | Stinnett West Texas | Wimberley | (tie) Highland Park/Waco Midway/Willis |
| 1997-98 | Moulton | Stinnett West Texas | Kirbyville | Highland Park |