As North Wasco County School District 21 wraps up its 2015-16 academic year, preparation is underway to convert the entire district to a trimester schedule in 2016-17. Superintendent Candy Armstrong says the shift to the trimester system at The Dalles High School brought positive results, with overall grade point averages and attendance improving. She adds the trimester system also provides more checkpoints for teachers and parents to measure student progress. The Dalles Middle School and all elementary schools will be on trimesters in 2016-17.