The development of instruments to measure the quality of early childhood programs has been a major part of the work of the authors of these scales.  In addition to our own scales, we have developed, in close collaboration with the sponsoring agencies, the following instruments for the field:  the original NAEYC Center accreditation classroom observation and the accreditation questionnaires; the CDA Classroom Observation; the Wellsley College ASQ school age care scale and director’s questionnaire, which was used in the National School Age Care Alliance  accreditation program; the Quality Criteria for Family Child Care; and the Military Family Child Care accreditation procedures and instruments.