- 81 - 2.3 Part-Time General Continuation Classes for Industrial Workers. 2.31 Procedure to Be Used by the State to Assure That Enrollees Are Qualified and That Instruction Will Be Designed Primarily to Increase the Civic Intelligence of Enrollees. Part-time general continuation classes may be organized for workers in industrial pursuits who have left the full-time day school and who are enrolled for instruction which is designed to increase their civic intelligence rather than to develop specific occupational competence. Enrollees in part-time general continuation classes must be at least 16 years of age and less than 18 years of age. 2.32 Time Plans for Classes and Employment. Enrollees in part-time general continuation classes shall be employed in an industrial pursuit for at least half of the usual working week of the occupation in which they are employed, and in no case shall the weekly hours of employment be less than 15 hours per week. The time at work shall equal or exceed the time in clock hours devoted to school instruction throughout the year. In no case shall the time at school and the time at work be such as to violate legal employment regulations. If Smith-Hughes funds are used, the instruction must equal or exceed 144 hours per year. 2.33 Qualifications of Teachers. 2.33-1 Experience in Industrial Education. Teachers shall have a minimum of two years of practical work experience in occupations considered indus- trial. 2.33-2 Training for Teaching in Industrial Education. Professional preparation requirements shall be the same as those for a teacher-coordinator of part-time cooperative training as described in 2.23 of this Section. 2.4 Day Trade and Technical Preparatory Classes, Types A, B, and C. Type A or B day preparatory classes may be operated in schools organized to offer instruction for not less than nine months and not less than 30 hours per week to students who have not entered upon employment and who are regularly enrolled in the full-time day school. High school students to be eligible to enroll in either a type A or type B trade or technical class shall be no less than 14 years of age by January 1 of the school year in which enrollment will occur and shall have satisfactorily ;com- pleted the ninth grade, except that those who are enrolled in