Detailed documentation is available on this page. See also our Communications.

Single indicator: Summary

Our National Single Indicator combines a number of standardised and well documented measures of school performance to provide a simple, straightforward benchmark of how well a school is doing. While the NSI is our own device, it is firmly based on the Department of Education’s own data ...Learn more

Using the single indicator

Welcome to - home of the National Single Indicator, our innovative tool for making informed but straightforward comparisons between the schools that you are interested in.

The Single Indicator is based on the same data used by the Department for Education to produce its Annual Performance Tables ...Learn more

National Single Indicator: Component measures

The Performance Tables have been published by the Department for Education (DfE), and its previous incarnations, since 1992 for Key Stage 4* and 1996 for Key Stage 2. The main aims of publication were to assist parents and carers in selecting schools for their children and to encourage school improvement by providing objective indicators against which schools’ performance could be measured.

The current performance tables provide over 200 separate data items per school ...Learn more

National Single Indicator (NSI): Calculations and methodology

The following performance indicators are used from the DfE's published Performance Tables data ...Learn more

What inspection judgements mean

An outstanding school is highly effective in delivering outcomes that provide exceptionally well for all its pupils’ needs. This ensures that pupils are very well equipped for the next stage of their education, training or employment. ...Learn more

About the Data

Contains public sector information licensed under ...Learn more

Disclaimer and Terms of Use

The use of this website is subject to the following terms of use ...Learn more


Tutorials are available on this page.


Some examples of search queries are shown in the following tables ... Learn more

Adjust the NSI using dials

Our National Single Indicator is made up of four well-recognised measures of school performance ... Learn more