I talked with someone whose school district is using Acuity to assess students in language arts and math. The district has decided to assess four times a year instead the much larger number they originally thought. The teachers get the results back. They discuss them at a team meeting and then they go back to teaching. The classroom teachers who have been given so much information do not have time to digest the information, let along figure out how they will change instruction. They do not have curriculum re-planning time. They do not collectively create remedial activities. They do not have an additional resources to help them in modifying their curriculum.
Although the idea of frequently assessing students throughout the year is an admirable concept, unless teachers are given adequate time to analyze the results, determine what changes they need to make, create/refocus learning materials, develop formative assessments, learn new ways of grouping students, then such frequent assessments serve no purpose except to lessen instructional time.