Source: Alan S. Bigger and Jeff Campbell, APPA, 2008
From the abstract:
The purpose of this study was to determine if there is a direct corrrelation between cleanliness and the resulting academic grade(s) of students. In 1992, APPA published the first edition of Custodial Staffing Guidelines for Educational Facilities; the second edition was published in 1998. This seminal document set the precedent for correlating levels of productivity and cleaning of facilities and has been used as justification for appropriate staffing levels at institutions. In addition, ISSA has long established cleaning times and guidelines that also address productivity issues.
However, such data is now being brought into question as performance indicators are being used to address specific outcomes of maintenance programs. The principal investigators led a team of researchers representing APPA and ISSA to collect data, review and research relevant literature, and determine whether levels of staffing and cleaning have an affect on the academic achievement of students.