This guide was developed to help local school districts review existing policies or establish new policies to address communicable diseases. Based on current scientific and medical information about the safety in allowing human immunodeficiency virus (HIV) infected students and staff to remain at school, it contains a suggested policy for local school districts. The suggested policy and its appendices are consistent with Montana Law on discrimination, and with state and federal public health recommendations. The guide uses the principles that HIV is not transmitted casually, and that transmission is not a problem in the school setting. Following a list of general recommendations is the suggested communicable disease control policy. The appendices, which contain the bulk of the document, include: the protocol for communicable diseases known not to be spread by casual contact; the Montana Department of Health and Environmental Sciences recommendations for preventing the transmission of HIV in the school setting; a suggested policy on confidentiality; and resource information. (TE)