As previously stated, standards-based mathematics goes much deeper than a changed
curriculum. Merely because a school adopts the new curriculum does not mean that teachers are
implementing it correctly. Furthermore, the schools in question had more than one teacher of
middle school mathematics. Their experience and enthusiasm for the profession will differ, and
in turn, affect student learning. Although the schools were from the same county, their contextual
factors were not identical. The number of students eligible for free or reduced-priced lunch as
well as the number students with an IEP or 504 plan differed between the schools affecting their
composite mathematics scores