program improvement initiatives have been implemented to help close the achievement gap to meet the proficiency requirements of the No Child Left Behind Act (NCLB) of 2001. Research suggests that teachers are more likely to meet the achievement gap demands if they: (a) work in collaboration with other teachers, (b) are supported and encouraged to look at student work and other achievement data together, (c) design and co-teach lessons and review their effects, and, (d) plan appropriate interventions collectively.