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Castleford School

Public, Alternative Grades PK, KG-12
229th
SchoolDigger Rank ?
of 350 Idaho Alternative Schools
Better than 35% of Idaho alternative schools
Summary

Castleford School is a small, rural pre-K through 12th grade school in Castleford, Idaho, serving 274 students as the sole school in the Castleford District. The school serves a high-poverty community, with 71.5% of students qualifying for free or reduced-price lunch in 2024–25.

The school's biggest strengths are attendance and graduation. Chronic absenteeism has consistently run well below the Idaho state average, with just 6.4% in 2023–24 compared to 15% statewide. Graduation rates have been outstanding too: 100% in three of the past four years. (The 2024–25 rate of 82.5% appears to be a data anomaly, since the state average and nearby Xavier Charter School report the identical figure.) High school students also perform above state averages on End-of-Course exams, with 62.5% proficient in science versus 41.2% statewide.

That said, overall test proficiency lags the state. On the 2025–26 ISAT assessments, 40.4% of students were proficient in math (vs. 43.1% statewide), 36.4% in science (vs. 42.7%), and 43.1% in English language arts (vs. 54.0%). The middle grades are the weakest area, particularly 7th grade math and 4th through 7th grade literacy. The comparison to Xavier Charter School, 19 miles away in Twin Falls, is notable: Xavier serves a wealthier population (30.7% free/reduced lunch) and spends less per student ($5,824 vs. $9,860) with larger classes, yet posts higher test scores. Castleford's results should be viewed in the context of its high-poverty enrollment, and the school's ability to keep students engaged and graduating despite those challenges is a genuine accomplishment.

274
Students ?
13.0
Student/teacher ratio ?
$9,860
Per pupil spending ?
71.5%
Free/discounted lunch ?
 500 Main Street
       Castleford, ID  83321-9998

(208) 537-6511

District: Castleford District

Racial breakdown:

White:
63.1%
Hispanic:
36.9%
 See top rated Idaho elementary schools

 Compare Castleford School to nearby alternative schools!
At a glance
▲ Ranking trend: Improving — 65th percentile in 2013 → 75th in 2026
Strengths
✓Ranking is trending up — up 10 percentile points since 2013
Worth a look
!Test scores below the Idaho average (40% vs 47% meeting standards)
!Some student groups rank well below the school's overall statewide standing
!English Language Arts scores 11 pts below the Idaho average
Students meeting standards (2025-2026) ?
This school40%
District avg40%
Idaho avg47%
Elementary school
229th of 350
Idaho public elementary schools ?
Bottom 35%▲ up 5 pts since 2024
From bottom 30% (2024) to bottom 35% (2026)
See the entire ranking list of Idaho Elementary Schools →
★★★★★
SchoolDigger rating ?
Middle school
128th of 177
Idaho public middle schools ?
Bottom 28%▼ down 4 pts since 2024
From bottom 32% (2024) to bottom 28% (2026)
See the entire ranking list of Idaho Middle Schools →
★★★★★
SchoolDigger rating ?
High school
31st of 124
Idaho public high schools ?
Top 25%▲ up 35 pts since 2024
From bottom 40% (2024) to top 25% (2026)
See the entire ranking list of Idaho High Schools →
★★★★★
SchoolDigger rating ?
Statewide rank percentile over time (100 = the top-ranked school in the state; click a legend item to add a student group)
Elementary school ranking
Show full rank history (all student groups)

All Students

YearAvg scoreStatewide rankIdaho percentileRating
202636.5229 of 35034.6%★★☆☆☆
202525.1265 of 33721.4%★☆☆☆☆
202429.6211 of 30129.9%★★☆☆☆
201342.8245 of 35731.4%★★☆☆☆
201247.2211 of 35440.4%★★☆☆☆
201157.5163 of 35954.6%★★★☆☆
201051.7193 of 35645.8%★★☆☆☆
200941.5237 of 34932.1%★★☆☆☆
200863.7116 of 33565.4%★★★☆☆
Middle school ranking
Show full rank history (all student groups)

All Students

YearAvg scoreStatewide rankIdaho percentileRating
202630.1128 of 17727.7%★☆☆☆☆
202519.4140 of 16615.7%★☆☆☆☆
202431.8112 of 16431.7%★★☆☆☆
201381.211 of 17393.6%★★★★★
201275.423 of 17186.5%★★★★☆
201155.376 of 16955.0%★★★☆☆
201058.262 of 16662.7%★★★☆☆
200965.247 of 16070.6%★★★★☆
200876.323 of 15885.4%★★★★☆
High school ranking
Show full rank history (all student groups)

All Students

YearAvg scoreStatewide rankIdaho percentileRating
202672.631 of 12475.0%★★★★☆
202565.536 of 11267.9%★★★☆☆
202442.596 of 15939.6%★★☆☆☆
201361.656 of 16065.0%★★★☆☆
201276.925 of 16284.6%★★★★☆
201180.514 of 16591.5%★★★★★
201086.07 of 16995.9%★★★★★
200865.852 of 15165.6%★★★☆☆

Female

YearAvg scoreStatewide rankIdaho percentileRating
202434.658 of 6612.1%★☆☆☆☆

Hispanic

YearAvg scoreStatewide rankIdaho percentileRating
202456.427 of 5550.9%★★★☆☆

Low Socio Economic Status

YearAvg scoreStatewide rankIdaho percentileRating
202450.623 of 3534.3%★★☆☆☆

Male

YearAvg scoreStatewide rankIdaho percentileRating
202429.153 of 6619.7%★☆☆☆☆

White

YearAvg scoreStatewide rankIdaho percentileRating
202433.858 of 7825.6%★☆☆☆☆
How student groups rank statewide ? (each group's percentile vs the same group at other schools — higher is better; the +/- beside each compares the group with this school's overall percentile)
High school
Hispanic (2024)51st percentile+11 vs school
Low Socio Economic Status (2024)34th percentile-5 vs school
White (2024)26th percentile-14 vs school
Male (2024)20th percentile-20 vs school
Female (2024)12th percentile-28 vs school
By subject vs Idaho (2025-2026) ?
English Language Arts43%-11 vs state
Math40%-3 vs state
Science36%-6 vs state

5.0
1 rating · 1 written review
5★1
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1★0
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What people are saying
by a parent on FaceBook
Wednesday, February 3, 2010

Open Quote I found it unbelievable to see Castleford as a 2 Star school on here especially if you use test scores since it is one of the only schools in our area that has managed to pass AYP every year with a large majority of ESL students in addition to a large percentage of kids from very low income homes.

What your rating does not reflect is the tremendous amount of community involvement there is with this small town school. The local men's club gives scholarships to every single kid that goes on for college or technical/vocational education after they graduate. Many of the high school students are taking dual credit classes with the local community college, College of Southern Idaho.

We can't wait until our twin boys start school here. How can you beat a 12.1 student teacher ratio at a public school no less? Close Quote




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Frequently Asked Questions about Castleford School

In the 2024-25 school year, 274 students attended Castleford School.

Castleford School ranks 229th of 350 Idaho alternative schools. SchoolDigger rates this school 2 stars out of 5.

Students at Castleford School are 63% White, 37% Hispanic.

Rate Castleford School!



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Schools in Castleford, ID

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Latest Idaho data All new data »
2025–26 attendance dataAug 19, 2026
2025–26 ISAT test scoresAug 19, 2026
2024–25 attendance data & graduation ratesJan 19, 2026
2024–25 ISAT test scoresAug 26, 2025


SchoolDigger data sources: National Center for Education Statistics, U.S. Department of Education, the U.S. Census Bureau and the Idaho Department of Education.

IMPORTANT DISCLAIMERS: Not all boundaries are included. We make every effort to ensure that boundaries are up-to-date. But it's important to note that these are approximations and are for general informational purposes only. To verify legal descriptions of boundaries or school locations, contact your local tax assessor's office and/or school district.

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