The courses of instruction offered at a school maintained pursuant to this chapter shall meet all applicable requirements of law, including the requirements prescribed by Chapter 2 (commencing with Section 51200) of Part 28 relating to physical education and Chapter 5.6 (commencing with Section 51930) of Part 28. For these purposes the instructional program shall be designed to provide at least the overall equivalent in instruction in each course of study required by law to be provided in kindergarten and grades 1 to 12, inclusive, upon the completion by a pupil of the work prescribed for any particular grade.