it could also shed light on the quality of small primary schools and ensure that learning considerations are at the forefront in the rationalisation of the school network see policy issue a school census assessment could also provide a more reliable indicator of student learning for supervisors to prioritise their interventions and assess the progress of school an example is mexicos new national plan to evaluate learning plan nacional de evaluacion de los aprendizajes planea which alternates full cohort with school and national sample assessments in different years and grades to provide useful timely and reliable data for national and school needs see table