table: [['school', 'location', 'mascot', 'county', 'enrollment 08 - 09', 'ihsaa class', 'ihsaa class football', 'year joined', 'previous conference'], ['chesterton', 'chesterton', 'trojans', '64 porter', '1921', '4a', '6a', '1970', 'calumet'], ['crown point', 'crown point', 'bulldogs', '45 lake', '2426', '4a', '6a', '1993', 'lake suburban'], ['lake central', 'saint john', 'indians', '45 lake', '3141', '4a', '6a', '2003', 'independents'], ['laporte', 'laporte', 'slicers', '46 laporte', '1956', '4a', '5a', '1976', 'northern indiana'], ['merrillville', 'merrillville', 'pirates', '45 lake', '2241', '4a', '6a', '1975', 'lake suburban'], ['michigan city', 'michigan city', 'wolves', '46 laporte', '1919', '4a', '5a', '1995', 'none (new school)'], ['portage', 'portage', 'indians', '64 porter', '2618', '4a', '6a', '1970', 'calumet'], ['valparaiso', 'valparaiso', 'vikings', '64 porter', '2072', '4a', '6a', '1970', 'independents']]
ref: 2 of the school were previously a part of the Calumet Conference before joining
template: 2 of the school were previously a part of the [ENT] [ENT] before joining