Each year, the IEP team is required to meet for the dual purpose of evaluating the implementation of the current IEP and to develop the next annual IEP. During these annual meetings, the IEP team should discuss the positive and negative elements of the special education services provided and determine, based on any new assessment data, what services should be provided in the upcoming school year.
While the IEP is redeveloped each year, the IEP team does not have to conduct the battery of assessments each year. At a minimum, the IEP team is to determine if formal evaluation is required every three years. However, the IEP team can ask that formal evaluations be conducted more frequently if needed.