Complex sentence: Cedar Rapids Xavier enters 4A sports competiton beginning with the 2008-09 school year, previously the school competed within the MVC 4A schedule but played at the 3A state tournament level.
Split into simpler sentences: Cedar Rapids Xavier enters 4A sports competiton and tournament play beginning with the 2008-09 school year. Previously the school competed within the Mississippi Valley Conference 4A schedule but played at the 3A state tournament level.