In partnership with the parents and community, the Lake Chelan School District will be responsible for providing an excellent educational environment where all students can work toward their full potential while gaining the skills necessary to be successful lifelong learners and contributing members of society.

Chelan Preparatory High School is an evening alternative school program. Students attend from 6:00 p.m. to 9:30 p.m., Monday through Friday. These students are primarily immigrants from Mexico and are limited or non-English speaking when they enter the school. The mission of the school is to present English as a Second Language instruction, as well as credit- producing content courses required for a high school diploma. Therefore, the content courses are written and presented in "Sheltered English" and include ESL strategies. Some courses contain a Spanish component. Reading, writing and speaking are taught and assessed simultaneously. Mastery of the essential academic learning requirements is a focus of every content course.