- 27 - 2.41 Provisions for Supervised Farming Program. The local administrators will allow the teacher of vocational agriculture time to provide instruction and supervision of students in supervised farming programs. Supervised farming experiences are obtained when the student conducts his program on the home farm and has complete control by ownership or lease agreement. The supervised farming program should include productive enterprise projects, improvement projects, and supple- mentary farm jobs. An individual farming program of satisfactory scope for each student must extend over a period of at least six months of each year. In lieu of adequate facilities on the home farm, teachers may approve any one of the following plans as a sub- stitute: 2.41-1 Assistance to the student in gaining satisfactory experiences by renting land in the community. 2.41-2 Provision for experiences on a school farm. 2.41-3 Placement of the student for farm experiences on a farm in the community. The experiences must be planned to cover phases of the teaching program and must be under the supervision of the agriculture teacher. 2.42 Length of Courses and Class Schedules. The minimum number of students for a class under no circumstances shall be less than nine. The course will be designed to meet the needs of persons over 14 years of age. A minimum of 500 hours of on-farm instruction per year is recommended in connection with the students' super- vised farming program. The course for all-day classes will be a minimum of three years in length. A four-year course of study is recommended and should be conducted in the majority of schools. The total hours of instruction for the four years will depend upon the plan adopted by each high school. 2.42-1 All-Day Classes. The length of the daily sessions and the number of class sessions per week will be determined by the plan adopted by each school, which may select as a minimum one of the following: