Our school is a K-12 private school. We are standards based and use diagnostic assessments for setting baseline skills of our students in reading, writing and math. We also use these tests fperiodically for checking student progress and adjusting instruction if necessary. To further aid our students understanding we instituted differentiated instruction three years ago. In order to do so, we provided our teachers with two years of extensive training and follow-up. The problem is there is still not school-wide use of the methods. Though all of our teachers have assured us that they agree with the philosophy many have been slow to implement it or resistant to give it a trial at all.
As educators who believe in differentiation, can you give me your insight into how to get the train out of the station? I know change takes time, effort and support, however maybe there are additional considerations which have not been met.