| 2007 Class 7-4A Regional Champions/Sectional Matchups
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| Sectional 1 @ Bellwood Roosevelt |
| Bellwood Roosevelt (13-2) vs. Bolingbrook Brooks (19-1) |
| Regional 1 | Bellwood Roosevelt def. Woodridge Jefferson, 39-35 |
| Regional 2 | Bolingbrook Brooks def. Romeoville Lukancic, 50-37 |
| Sectional 2 @ Park Forest Forest Trail |
| Harvey Brooks (11-1) vs. Park Forest Forest Trail (15-6) |
| Regional 3 | Harvey Brooks def. Robbins Kellar, 48-43 |
| Regional 4 | Park Forest Forest Trail def. Chicago Heights Washington, 43-42 |
| Sectional 3 @ Manteno |
| Country Club Hills Southwood (9-9) vs. Manteno (22-3) |
| Regional 5 | Country Club Hills Southwood def. Mokena, 33-32 |
| Regional 6 | Manteno def. Bourbonnais UGC, 44-32 |
| Sectional 4 @ Shorewood Troy |
| Shorewood Troy (17-3) vs. Channahon (15-9) |
| Regional 7 | Shorewood Troy def. Minooka, 26-23 |
| Regional 8 | Channahon def. Pontiac JHS, 34-31 |
| Sectional 5 @ Morton JHS |
| Normal Chiddix (20-2) vs. Morton JHS (23-0) |
| Regional 9 | Normal Chiddix def. Normal Parkside, 36-28 |
| Regional 10 | Morton JHS def. East Peoria Central, 46-7 |
| Sectional 6 @ Charleston |
| Danville North Ridge vs. Champaign Jefferson (12-9) |
| Regional 11 | Danville North Ridge def. Rantoul Eater, 62-59 |
| Regional 12 | Champaign Jefferson def. Charleston, 32-26 |
| Sectional 7 @ Springfield Grant |
| Rochester (16-4) vs. Springfield Franklin |
| Regional 13 | Rochester def. Lincoln JHS, 39-32 |
| Regional 14 | Springfield Franklin def. Springfield Grant, 36-24 |
| Sectional 8 @ Cahokia Wirth |
| Springfield Jefferson vs. East St. Louis Lincoln (16-0) |
| Regional 15 | Springfield Jefferson def. Jerseyville Illini, 59-46 |
| Regional 16 | East St. Louis Lincoln def. Cahokia Wirth, 49-30 |
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Class History
From 1930 to 1972, there were two classes of basketball, Class A
(Heavyweight) and Class B (Lightweight). An additional class was added in 1973--Class C (7th Grade). The Heavyweight and Lightweight classes were based on age, height and weight. From 1977-1984, the Heavyweight class was divided into two classes based upon enrollment--(A & AA). From 1985-2006, the Association adopted the format of 7th and 8th grade play based upon a school's enrollment (7A, 7AA, 8A and 8AA). Starting in 2007, the Association adopted a four class system in each grade level (7-1A, 7-2A, 7-3A, 7-4A, 8-1A, 8-2A, 8-3A and 8-4A). The current classification system assigns 25% of the schools to each of the four classes.
How Class Split is Determined
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