provided. (See Appendix, Drawing 10.) Amount of
 audio-visual materials and equipment to be housed
 should be determined in consultation with the librarian
 or audio-visual coordinator at the school or county
 level.
 b. Storage space for roller-type maps. Provide one set of
 hooks so that a map can be unrolled for examination
 before it is checked out.
 c. Storage cabinet for recordings (See Appendix, Draw-
 ing 6.)
 d. At least two conveniently placed double electrical out-
 lets or electrical wire molding
 e. Darkening facilities and acoustical treatment if used
 for previewing and listening
 F. Photographic Darkroom
 1. Purposes and Activities
 a. Studying photography
 b. Producing graphic and photographic materials for
 classes and student publications
 2. Space Allocation
 At least 100 square feet preferably a square room
 3. Placement
 a. Readily accessible to all groups desiring to use it
 b. Adjacent to the department that is to assume respon-
 sibility for its use (This may be adjacent to the ma-
 terials center, the science department, the industrial
 arts department, or another related department.)
 4. Equipment
 Consult references in bibliography and persons experi-
 enced in equipping and operating this facility.

 III. Suggested Layouts
 Sample plans have been included in the Appendix to sug-
gest varieties of ways in which space may be used for particu-
lar shapes in the sizes and types of schools specified. For the
secondary schools suggested layouts are a sample plan for a
materials center in a rectangular space serving a school enroll-
ment of 500 and another sample plan for a center occupying a
modified square space and serving a school enrollment of 1,500.