The Jefferson County School District (Colorado) has developed a manual of high school specifications for Design Advisory Groups and consultants to use for planning and designing the district's high school facilities. The specifications are provided to help build facilities that best meet the educational needs of the students to be served. Descriptions of the learning spaces and the spaces required to support and manage the learning activities are provided, along with descriptions of each space's function and the spatial relationship requirements, and specific specifications for furnishings and equipment where applicable. Areas covered include: the core spaces for administration/counseling; cafeterias; auditoriums; physical education and athletic complex; the instructional spaces for general classrooms, science labs, various special labs, music and art classrooms; and classrooms for special education. Additional specifications cover site development standards; building space allocations and wiring standards; mechanical, electrical, and communication rooms; special systems; acoustic criteria; and furniture and equipment. Appendices include a data diagram, an enrollment projection report, media and room finish matrices, prototype kitchen plans, and technical guidelines. (GR)