This first volume of a two-volume curriculum guide contains 11 problem areas selected for study to be included in a core curriculum for 11th-grade or third-year students enrolled in a metropolitan agricultural program. The 11 problem areas are divided into eight units: Orientation to Agricultural Occupations (Gaining Employment), Supervised Occupational Experience (Evaluating Supervised Occupational Experience Programs and Analyzing Student Records), Leadership in Horticulture/Agriculture (Utilizing Horticultural Organizations and Resources), Horticultural /Agricultural Mechanics (Repairing Greenhouse or Horticultural Equipment, and Plumbing and Irrigation Systems), Plant Propagation (Propagating Softwood Cuttings, and Propagating Woody Plants by Budding and Grafting), Plant Identification (Reviewing and Applying Plant Identification Skills), Growing Horticultural Crops (Growing Small Fruits and Brambles, and Growing Tree Ftuits), and Identifying and Controlling Pests of Horticultural Plants (Handling Pesticides Safely and Passing Certification Tests). A rationale for omitting Unit I, on Urban Animals, From Core III, is contained in the document. Each problem area includes some or all of the following components: suggestions to the teacher, a teacher guide (containing objectives, suggested interest approaches, anticipated student problems and concerns, suggested learning activities and experiences, application procedures, an evaluation, references, and aids), information sheets, student worksheets or assignment sheets with a key, job sheets or laboratory exercises, transparencies, a discussion guide for transparencies, and sample test questions with a teacher key. (YLB)