The system cannot rely on consistent tools for measuring the quality and effectiveness of the education system and the actual achievement of learning outcomes, as there are neither external assessments of learning, based on standardised national assessments, nor external evaluations of schools and leaching. Students advance from grade to grade as they are assessed in schools by their teachers, and external examinations are only used to regulate tertiary education's admissions. A provision regarding evaluation of schools was included in the law passed in May 2010 (3848/201) which also included requirements regarding the conditions surrounding the employment of teachers, school directors, and others (see section on current references in the section on development and use of human resources). It will also include suggestions for improvement in the next school year.