Summary:
Zip code 83851, covering the Plummer, Idaho area, is served by a single high school—Lakeside High School—which enrolls about 125 students in grades 9 through 12 within the Plummer-Worley Joint District.
Lakeside High School is a small, rural school where 70.4% of students qualify for free or reduced-price lunch, and the student-teacher ratio is a favorable 10.6 to 1. The school has shown meaningful long-term improvement: its state ranking climbed from the bottom 5% of Idaho high schools in 2011–2013 (zero stars) to the 20th percentile in 2025–2026 (one star). The graduation rate matches the state average at 82.5%, which is a positive sign for families. The district also invests heavily in its students, spending $21,499 per pupil, a reflection of the costs of running a small rural school.
However, there are serious challenges. Chronic absenteeism is the most pressing issue: 44.1% of Lakeside students are chronically absent, more than triple the state rate of 13.8%. This likely contributes to academic struggles. In math, only 21.4% of students are proficient on the ISAT, compared with 33.1% statewide, meaning about four out of five students are not meeting math standards. English Language Arts results are mixed: 50% of students are proficient on the end-of-course exam, which is below the state’s 61.3%, but the school’s all-grades ELA proficiency of 36.7% is notably higher than the district average of 26.6%. For parents, the key takeaway is that Lakeside demonstrates steady progress and strong local investment, but reducing chronic absenteeism and boosting math achievement are the most critical areas for improvement.
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