Strömma Naturbrukscentrum AB in Mark

Upper secondary schoolOperator: Strömma Naturbrukscentrum AB · Mark, Västra Götalands County

Headmaster: Marie Poldahl

Compared to all upper-secondary schools nationally

Skolkoll Score 66 out of 100. The scale goes from 0 (lowest) to 100 (highest). 50 is the average. Better than 50% of Sweden’s upper secondary schools.

A composite of five open data sources — a starting point, not a grade.

Data coverageMedium3/5

Why this score?

Skolkoll score is Skolkoll's composite indicator based on available data sources. It is not an official quality measure and should be read together with the underlying data.

3 of 5 score dimensions have school-specific data.

When school-specific data is missing for a dimension, the neutral value 50 is used. That does not automatically lower the school, but it makes the score less informative.

What is the Skolkoll Score?

Strömma Naturbrukscentrum AB is a medium-sized independent upper secondary school with 200 pupils.
Strömma Naturbrukscentrum AB is a medium-sized independent upper secondary school with 200 pupils. The share of qualified teachers (100%) is above the national average of 78%.

200
Pupils
Municipality: 1,270
High reliability
100%
Qualified teachers
Municipality: 80% · Sweden: 78%
High reliability
10.4
Pupils per teacher
Municipality: 10.2 · Sweden: 12.1
High reliability
160,232 SEK
Cost per pupil (municipal avg.)
Sweden: 144,179 SEK
Limited history

Skip table of contents

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 1 academic years. Visit each source for the full time series.

Academic year	Pupils	Qualified teachers	Avg. grade	Cost/pupil (municipality)
2026/27	200	—	—	—

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 are shown in one chronology. Each row states its row type, origin and data trust so authority data is not mixed up with Skolkoll's own signals.

School history

3 priority events out of 24 total: Authority record · Operator changed; Authority record · Operator name changed; Authority decision · Injunction.

Important6Register changes23Context1Signals0

Showing all 24 events. Enable JavaScript to filter the timeline.

Quick overview

Choose which layers to show in the same date-ordered timeline.

2027
2027
Statistics vintageStatisticsSkolverket
Pupil count: statistics vintage available
Pupil count is available for 2027. This is data availability, not a school event.
high reliabilityknown year
Show detailsHide details
Source
Skolverket
Reliability
High: the information comes from an authority source or a matched authority decision.
What the date means
Only the year is known, so the event is placed at year level.
2023
2023-06-13
Authority recordNameSkolverket
Operating name started being reported
Skolverket started reporting the operating name "Strömma Naturbrukscentrum AB". This is source history, not a confirmed name change.
high reliabilityfound in data check
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Source
Skolverket
Reliability
High: the information comes from an authority source or a matched authority decision.
What the date means
The date shows when Skolkoll found the change in a data check. The change may have happened earlier.
2019
2019-07-03
Authority recordHeadmasterSkolverket
Head changed
The principal changed in the register. The name is not shown in history.
high reliabilityfound in data check
Show detailsHide details
Source
Skolverket
Reliability
High: the information comes from an authority source or a matched authority decision.
What the date means
The date shows when Skolkoll found the change in a data check. The change may have happened earlier.
2018
2018-06-28
Authority decisionInspectionSwedish Schools Inspectorate
Injunction
Decision includes injunction, fine or serious deficiency. Document title: Förstagångstillsyn Skolbeslut Mark Strömma Naturbrukscentrum, 2018 (pdf, 3278 kB).
high reliabilityknown date
Read decision (PDF) ↗
Show detailsHide details
Source
Swedish Schools Inspectorate
Reliability
High: the information comes from an authority source or a matched authority decision.
What the date means
The date is a known decision, publication or register date.
2018-06-07
Authority recordHeadmasterSkolverket
Head changed
The principal changed in the register. The name is not shown in history.
high reliabilityfound in data check
Show detailsHide details
Source
Skolverket
Reliability
High: the information comes from an authority source or a matched authority decision.
What the date means
The date shows when Skolkoll found the change in a data check. The change may have happened earlier.
2017
2017-11-23
Authority recordContactSkolverket
Contact details changed
From "url: http://www.naturbruk.nu/stromma, phone: 0301-47500" to "url: http://strommanaturbruk.se, email: info@strommanaturbruk.se, phone: 0301-47500".
high reliabilityfound in data check
Show detailsHide details
Source
Skolverket
Reliability
High: the information comes from an authority source or a matched authority decision.
What the date means
The date shows when Skolkoll found the change in a data check. The change may have happened earlier.
2017-11-23
Authority recordHeadmasterSkolverket
Head changed
The principal changed in the register. The name is not shown in history.
high reliabilityfound in data check
Show detailsHide details
Source
Skolverket
Reliability
High: the information comes from an authority source or a matched authority decision.
What the date means
The date shows when Skolkoll found the change in a data check. The change may have happened earlier.
2017-11-23
Authority recordLocationSkolverket
Visiting address changed
From "ingen besöksadress, 51199 SÄTILA" to "Strömma, 51199 Sätila".
high reliabilityfound in data check
Show detailsHide details
Source
Skolverket
Reliability
High: the information comes from an authority source or a matched authority decision.
What the date means
The date shows when Skolkoll found the change in a data check. The change may have happened earlier.
2017-07-01
Authority recordContactSkolverket
Contact details changed
From "url: http://www.naturbruk.nu/stromma, email: strommaskolan@vgregion.se, phone: 0301-47500" to "url: http://www.naturbruk.nu/stromma, phone: 0301-47500".
high reliabilityfound in data check
Show detailsHide details
Source
Skolverket
Reliability
High: the information comes from an authority source or a matched authority decision.
What the date means
The date shows when Skolkoll found the change in a data check. The change may have happened earlier.
2017-07-01
Authority recordOperatorSkolverket
Operator changed
From "VÄSTRA GÖTALANDS LÄNS LANDSTING" to "Strömma Naturbrukscentrum AB".
high reliabilityfound in data check
Show detailsHide details
Source
Skolverket
Reliability
High: the information comes from an authority source or a matched authority decision.
What the date means
The date shows when Skolkoll found the change in a data check. The change may have happened earlier.
2017-07-01
Authority recordOperatorSkolverket
Operator type changed
From "REGION" to "ENSKILD".
high reliabilityfound in data check
Show detailsHide details
Source
Skolverket
Reliability
High: the information comes from an authority source or a matched authority decision.
What the date means
The date shows when Skolkoll found the change in a data check. The change may have happened earlier.
2017-07-01
Authority recordProgrammesSkolverket
Orientation type changed
From "EJ_RELEVANT" to "ALLMAN".
high reliabilityfound in data check
Show detailsHide details
Source
Skolverket
Reliability
High: the information comes from an authority source or a matched authority decision.
What the date means
The date shows when Skolkoll found the change in a data check. The change may have happened earlier.
2017-07-01
Authority recordNameSkolverket
School name changed
From "Naturbruksskolan Strömma" to "Strömma Naturbrukscentrum".
high reliabilityfound in data check
Show detailsHide details
Source
Skolverket
Reliability
High: the information comes from an authority source or a matched authority decision.
What the date means
The date shows when Skolkoll found the change in a data check. The change may have happened earlier.
2017-07-01
Authority recordProgrammesSkolverket
School types changed
From "GY, GYAN, VUX" to "GY".
high reliabilityfound in data check
Show detailsHide details
Source
Skolverket
Reliability
High: the information comes from an authority source or a matched authority decision.
What the date means
The date shows when Skolkoll found the change in a data check. The change may have happened earlier.
2016
2016-08-17
Authority recordHeadmasterSkolverket
Head changed
The principal changed in the register. The name is not shown in history.
high reliabilityfound in data check
Show detailsHide details
Source
Skolverket
Reliability
High: the information comes from an authority source or a matched authority decision.
What the date means
The date shows when Skolkoll found the change in a data check. The change may have happened earlier.
2016-06-13
Authority recordNameSkolverket
School name changed
From "Naturbruksgymnasiet Strömma" to "Naturbruksskolan Strömma".
high reliabilityfound in data check
Show detailsHide details
Source
Skolverket
Reliability
High: the information comes from an authority source or a matched authority decision.
What the date means
The date shows when Skolkoll found the change in a data check. The change may have happened earlier.
2015
2015-11-26
Authority recordHeadmasterSkolverket
Head changed
The principal changed in the register. The name is not shown in history.
high reliabilityfound in data check
Show detailsHide details
Source
Skolverket
Reliability
High: the information comes from an authority source or a matched authority decision.
What the date means
The date shows when Skolkoll found the change in a data check. The change may have happened earlier.
2015-08-20
Authority recordHeadmasterSkolverket
Head changed
The principal changed in the register. The name is not shown in history.
high reliabilityfound in data check
Show detailsHide details
Source
Skolverket
Reliability
High: the information comes from an authority source or a matched authority decision.
What the date means
The date shows when Skolkoll found the change in a data check. The change may have happened earlier.
2015-06-11
Authority recordHeadmasterSkolverket
Head changed
The principal changed in the register. The name is not shown in history.
high reliabilityfound in data check
Show detailsHide details
Source
Skolverket
Reliability
High: the information comes from an authority source or a matched authority decision.
What the date means
The date shows when Skolkoll found the change in a data check. The change may have happened earlier.
2015-06-11
Authority recordOperatorSkolverket
Operator name changed
From "Västra Götalandsregionen Naturbrukskansliet" to "VÄSTRA GÖTALANDS LÄNS LANDSTING".
high reliabilityfound in data check
Show detailsHide details
Source
Skolverket
Reliability
High: the information comes from an authority source or a matched authority decision.
What the date means
The date shows when Skolkoll found the change in a data check. The change may have happened earlier.
2014
2014-09-30
Authority recordHeadmasterSkolverket
Head changed
The principal changed in the register. The name is not shown in history.
high reliabilityfound in data check
Show detailsHide details
Source
Skolverket
Reliability
High: the information comes from an authority source or a matched authority decision.
What the date means
The date shows when Skolkoll found the change in a data check. The change may have happened earlier.
2014-07-04
Authority recordHeadmasterSkolverket
Head changed
The principal changed in the register. The name is not shown in history.
high reliabilityfound in data check
Show detailsHide details
Source
Skolverket
Reliability
High: the information comes from an authority source or a matched authority decision.
What the date means
The date shows when Skolkoll found the change in a data check. The change may have happened earlier.
2014-07-04
Authority recordLocationSkolverket
Visiting address changed
From "51199 SÄTILA" to "ingen besöksadress, 51199 SÄTILA".
high reliabilityfound in data check
Show detailsHide details
Source
Skolverket
Reliability
High: the information comes from an authority source or a matched authority decision.
What the date means
The date shows when Skolkoll found the change in a data check. The change may have happened earlier.
2013
2013-10-01
Authority recordLifecycleSkolverket
School started
Skolverket records 2013-10-01 as the school's start date.
high reliabilityknown date
Show detailsHide details
Source
Skolverket
Reliability
High: the information comes from an authority source or a matched authority decision.
What the date means
The date is a known decision, publication or register date.

Register sources: Skolverket (fetched 5 Jul 2026), the Swedish Schools Inspectorate (fetched 3 Jul 2026) and group lookup from Bolagsverket/Skolkoll. Computed signals are marked separately and use year-level date precision.

Does something look wrong? Report an error in the history.

Quality data (Skolverket Statistical Database)

Costs, personnel data and school survey results from Skolverket's quality system.

Costs per pupil

Total cost: 368 SEK Limited history

School survey (agree, %)

Safety, upper secondary yr 2: 80% Limited history
Study peace, upper secondary yr 2: 63% Limited history
Anti-bullying, upper secondary yr 2: 56%
Stimulation, upper secondary yr 2: 60%

Source: Skolverket Statistical Database (Statistikdatabasen). Updated annually.

Demography

Pupil forecast — Mark

Number of children in the age group ages 16–18 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.

ages 16–18 (2025)1,385

ages 16–18 (2030)1,281

ages 16–18 (2035)1,297

Change 2025→2030-7.5%

Source: SCB (population forecast for Mark municipality, by school-form age group).

Mark municipality — history (school form: upper secondary 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	1,387	1,396	1,339	1,296	1,278
Avg. graduation grade	14.6	14.8	14.8	14.9	14.7
Examination rate (3 yr)	71.6%	72.4%	69.4%	71.8%	67.8%
Higher-ed eligibility (3 yr)	51.9%	53.4%	52.7%	55.7%	51.4%
Cost per pupil	158,050 SEK	150,466 SEK	147,393 SEK	143,795 SEK	138,672 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.

How sources are labelled

Skolkoll separates official statistics, its own processing, and information from a school or provider.

Official/statistical source: Data from an authority, municipality or other published statistical source. Date and source should be shown where possible.Affects score where the method says so
Skolkoll processing: Calculated, normalised or assembled by Skolkoll from published sources. The method should be documented.Affects score where the method says so
School-reported information: Information from the school or provider. It is shown separately and does not affect ranking or Skolkoll score without a published methodology decision.Does not affect score/ranking
Editorial/method text: Explanations, checklists and interpretation support from Skolkoll. This supports further review; it is not an official decision.Does not affect score/ranking

Swedish National Agency for Education (Skolverket)Fetched 5 Jul 2026
Pupil count, qualifications, grades, teacher numbers per school
Skolverket SALSAFetched 3 Jul 2026
Model-based expected results based on pupil composition
Swedish Schools Inspectorate (Skolinspektionen)Fetched 3 Jul 2026
Inspection decisions, remarks, complaints
Statistics Sweden (SCB)Fetched Not available
Fetch date is missing in dataset metadata; no school-register date is used as a substitute.
Population and economic data
KoladaFetched 3 Jul 2026
Municipal key figures, financial data per school form
LantmäterietFetched Not available
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.

Open data — all schools

Strömma Naturbrukscentrum AB in Mark

Key figures over time

School history

Quick overview

Pupil count: statistics vintage available

Operating name started being reported

Head changed

Injunction

Head changed

Contact details changed

Head changed

Visiting address changed

Contact details changed

Operator changed

Operator type changed

Orientation type changed

School name changed

School types changed

Head changed

School name changed

Head changed

Head changed

Head changed

Operator name changed

Head changed

Head changed

Visiting address changed

School started

Quality data (Skolverket Statistical Database)

Costs per pupil

School survey (agree, %)

Mark municipality — history (school form: upper secondary school)

Data sources

Methodology and definitions

Export