This first of two parts presents learning activities for four occupational clusters of a ninth-grade cluster program. It contains theory and hands-on activities that explore the occupational requirements and working environment of these areas to help students make intelligent decisions of possible career choices based on levels of interest and ability. The necessary mathematics, applied science, and English are included as related subject areas. The four occcupational clusters and (at least) six basic occupational areas within each occupations field included here are (1) business and distributive occupations (accountant/bookkeeper, hotel/motel manager, business manager, retailer, data processor, secretary), (2) communications and media occupations (commercial artist, graphics worker, media technician, photographer, radio and television announcer, set manager), (3) construction occupations (cabinetmaker/carpenter, fiberglass industry worker, furniture finisher/rebuilder, mason, painter/decorator, surveyor), and (4) environmental occupations (commercial fisherman, horticulturist, environmental health technician, marine technician, forestry technician, wetlands manager). Each cluster lists goals and objectives and then is divided into the occupations. Each occupation section contains a chart listing related learning activities; student activities; tools, equipment, materials; time required; and evaluation. The learning activities follow. (YLB)