Does Option One apply to the full instructional day?
Yes. As described in Education Code Section 52122(b)(2)(A), Option One shall be for the full regular school day, which means a “substantial majority” of the instructional minutes offered per day. A pupil/teacher ratio larger than 20-to-1 is permitted for limited periods of time, but these periods of time must be kept to a minimum and instruction in reading and math may not be delivered during these times. For example, it is permissible for groups larger than 20 to participate in a music, art, or physical education class for short periods of time.
