33 /100
Skolkoll Score 33 out of 100. The scale goes from 0 (lowest) to 100 (highest). 50 is the average. This value is below average. Better than 21% of Sweden's compulsory schools
What is the Skolkoll Score?Deltaskolan is a medium-sized group-operated compulsory school with 150 pupils.
Deltaskolan is a medium-sized group-operated compulsory school with 150 pupils. The share of qualified teachers (37%) is below the national average of 74%.
- 150PupilsMunicipality: 10,400High reliability
- 37%Qualified teachersMunicipality: 64% · Sweden: 74%High reliability
- 206.5Merit value yr 9Municipality: 212.5 · Sweden: 227.6Moderate reliability
- -4.0SALSA residualModel: 206.0Moderate reliability
- 9.0Pupils per teacherMunicipality: 13.4 · Sweden: 12.1High reliability
- 138,924 SEKCost per pupil (municipal avg.)Sweden: 142,155 SEKLimited history
The Data view is optimised for in-depth analysis: history, sources, methodology and export. For a summary interpretation, see Overview.
Key figures over time
Summary of the central metrics for the most recent 5 academic years. Visit each source for the full time series.
| Academic year | Pupils | Qualified teachers | Avg. grade | Cost/pupil (municipality) |
|---|---|---|---|---|
| 2526 | 150 | 37% | — | — |
| 2425 | — | 35% | 206.5 | — |
| 2324 | — | 32% | 234.2 | — |
| 2223 | — | 29% | 204.1 | — |
| 2122 | — | 45% | 216.1 | — |
Source: Skolverket + Kolada (cost is municipal average, not school-specific).
School history
Events from Skolverket's unit register, Skolinspektionen inspections, group history, and locally-computed statistical signals. Source events and computed signals are shown separately so authority data is not mixed with deviation indicators.
Most significant registered changes
3 priority events out of 11 total: Lifecycle — School started; Signal — Merit rating changed unusually much; Signal — Qualified teachers changed unusually much.
All 11 Lifecycle 1 Statistics 5 Signal 5
high 6 medium 5 low 0
12 months3 years10 yearsAll
Quick overview
Few, high-confidence events for guardians and pupils. Low-confidence events, statistics publications, and technical source traces appear in the views below.
-
Lifecycle School started
Skolverket records 2013-10-01 as the start date for this compulsory school operated by Deltaskolan AB, current status AKTIV.
Source history
Name, operator, status and headmaster changes; inspection decisions; statistics publications; and traceable group history. These rows are source-tagged with origin and confidence.
No source-tagged name, operator, status, headmaster, inspection, statistics or group events for Deltaskolan in the sources Skolkoll holds locally.
In-depth analysis
Indications, low-confidence rows, statistics publications, and technical source history — for school leaders, journalists, and analysts.
-
Statistics Pupil count: statistics vintage available
Pupil count is available for 2026. This is data availability, not a school event.
-
Statistics Pupils per teacher: statistics vintage available
Pupils per teacher is available for 2026. This is data availability, not a school event.
-
Statistics Qualified teachers: statistics vintage available
Qualified teachers is available for 2026. This is data availability, not a school event.
-
Statistics Merit rating: statistics vintage available
Merit rating is available for 2025. This is data availability, not a school event.
-
Statistics Upper-secondary eligibility: statistics vintage available
Upper-secondary eligibility is available for 2025. This is data availability, not a school event.
Computed signals
Larger year-over-year movements in historical key figures. These rows are Skolkoll's computations from existing history and should NOT be read as authority decisions or quality judgements.
-
Signal Merit rating changed unusually much
Merit rating decreased by 27.7 points from 234.2 to 206.5 between 2024 and 2025. This is a calculated signal, not a register decision.
-
Signal Merit rating changed unusually much
Merit rating increased by 30.1 points from 204.1 to 234.2 between 2023 and 2024. This is a calculated signal, not a register decision.
-
Signal Qualified teachers changed unusually much
Qualified teachers decreased by 16 pp from 45% to 29% between 2022 and 2023. This is a calculated signal, not a register decision.
-
Signal Merit rating changed unusually much
Merit rating decreased by 38.2 points from 254.3 to 216.1 between 2021 and 2022. This is a calculated signal, not a register decision.
-
Signal Upper-secondary eligibility changed unusually much
Upper-secondary eligibility decreased by 10 pp from 100% to 90% between 2021 and 2022. This is a calculated signal, not a register decision.
Register sources: Skolverket (fetched 27 May 2026), Skolinspektionen (fetched 3 May 2026), and group lookup from Bolagsverket/Skolkoll. Computed signals are tagged with source "Skolkoll calculation" and have year-level date precision.
Spotted something wrong? Report an error in the history.
Quality data (Skolverket Statistical Database)
Costs, personnel data and school survey results from Skolverket's quality system.
Personnel
Source: Skolverket Statistical Database (Statistikdatabasen). Updated annually.
Operator finances — Deltaskolan AB
Key figures from the operator's most recent annual report (period ending 2025-06-30).
Figures are for the operator (Deltaskolan AB), which may run several schools — not for this individual school.
Source: Bolagsverket (annual report, period ending 2025-06-30).
Pupil forecast — Haninge
Number of children in the age group ages 6–15 in the municipality, according to SCB's forecast.
Forecast covers all children in this age group across the entire municipality — not just this school's catchment. Local enrolment depends on school choice and migration patterns.
Source: SCB (population forecast for Haninge municipality, by school-form age group).
Haninge municipality — history (school form: compulsory school)
Municipality-aggregated key figures from Kolada over the most recent 5 years. Shown as municipality average — not school-specific values — because Kolada reports financial and pedagogical metrics at school-form level per municipality.
| Measure | 2025 | 2024 | 2023 | 2022 | 2021 |
|---|---|---|---|---|---|
| Pupils | 11,570 | 11,545 | 11,477 | 11,313 | 11,062 |
| Merit value yr 9 | 210.8 | 206.9 | 209.0 | 215.3 | 225.4 |
| Eligibility for upper secondary | 69.0% | 64.9% | 62.3% | 62.2% | 61.1% |
| Pupils per teacher | 14.4 | 14.2 | 13.7 | 13.8 | 13.8 |
| Cost per pupil | 138,924 SEK | 143,757 SEK | 130,197 SEK | 117,014 SEK | 112,977 SEK |
Source: Kolada (Swedish council for municipal analyses).
Data sources
Skolkoll is built exclusively on public data sources. Each row below shows the source, fetch date, and which metrics come from it.
-
Pupil count, qualifications, grades, teacher numbers per school
-
Model-based expected results based on pupil composition
-
Inspection decisions, remarks, complaints
-
Fetch date is missing in dataset metadata; no school-register date is used as a substitute.
Population and economic data
-
Municipal key figures, financial data per school form
-
Fetch date is missing in dataset metadata; no school-register date is used as a substitute.
Property register, buildings, orthophotos (CC BY 4.0)
Methodology and definitions
- Skolkoll methodology (overview) — how data is fetched, validated and displayed.
- Skolkoll Score — calculation, weighting, interpretation guide.
- SALSA model — what it measures and what it doesn't.
- Qualified teachers — definition and data source.
- Corrections policy — how errors are fixed and documented.
Export
Download data for your own analysis. Files are CSV with UTF-8 encoding.