HOW TO READ THE TABLES

The tables provide the following details for each school included: name, address, and telephone number; type of school; and the age range. More detailed explanation is contained in the abbreviations and their meanings section.

The four columns show (i) the total number of pupils on the school roll, (ii) the number of pupils on the school roll aged 11 at the start of the academic year, (iii) the total number and percentage of pupils on the school roll with statements of special educational needs (SEN), and (iv) the number and percentage of pupils on the school roll with SEN without statements.

The second set of columns show the percentage of eligible pupils achieving Level 4 or above in the English, mathematics and science tests, and the percentage of pupils absent or disapplied from the tests.

The average point score (APS) is calculated by allocating points to each pupil's Key Stage 2 results in each test (using the equivalencies set out below) then dividing that total by the number of eligible pupils in each subject. This means that the average achievement of pupils in a school is shown as a number that can be interpreted using the table below. For example, a score of 30 would mean that, on average, pupils achieved more than Level 4 but less than Level 5. For a school with 100% of pupils achieving Level 4 or above in all three subjects a score of 30 would tell you that a proportion of pupils have achieved Level 5 or above in some or all of the tests.

The third set of columns show the value added information.

The value added 'measure' for each school is based on the value added scores of their individual pupils. A pupil's value added score is based on comparing their KS2 performance with the median - or middle - performance of other pupils with the same or similar prior attainment at KS1. The individual scores are averaged to give a score for the school which, in the pilot, is represented as a number centred around 100. This indicates the value the school has added on average for their pupils.

Measures above 100 represent schools where pupils on average made more progress than similar pupils nationally, while measures below 100 represent schools where pupils made less progress.

For the KS1 to KS2 value added measure, a measure of 101 means that on average each of the school's pupils made a sixth of a National Curriculum level more progress between KS1 and KS2 than the median for pupils with similar KS1 attainment. This represents approximately one term's extra progress. Conversely a measure of 99 means that the school's pupils made a term's less progress.

The degree of significance which can be attached to any particular school's value added measure depends, among other factors, on the number of pupils included in the value added calculation. The smaller the number of pupils, the less confidence can be placed on the value added measure as an indicator of whether the effectiveness of a school is significantly above or below average. As a guide, at KS1 to KS2, with schools of 30 or more pupils in the value added measure, measures of 99.1 to 100.9 represent broadly average performance while for schools with 50+ pupils, measures of 99.3 to 100.7 are broadly average.

When comparing the measures for two schools a similar effect holds: at KS1 to KS2 when comparing schools with cohorts of about 30 pupils, differences of up to 1.3 should not be regarded as significant, while for schools with about 50 pupils, differences up to 1.0 should not be regarded as significant.

Particular care should be taken with the results for schools where cohort sizes are small. For example, for schools with 10 pupils included in the value added measures, only measures of below 98.4 or above 101.6 are likely to be significantly different from the average.

The value added measure is divided into 5 bands (A, B, C, D and E). The bands have been constructed in such a way that, nationally, band A relates to the top 5% of schools ranked by their value added measure; band B, the next 20%; band C, the middle 50% of schools; band D, the next 20% of schools; and band E, the 5% of schools with the lowest value added measures. The technical annex provides more detail on the value added measures within each band. The cut-off values for each band have been calculated from national data therefore it is possible that the proportion of schools included in each band within this pilot publication will not mirror the national 5/20/50/20/5 distribution exactly.

The final two columns show:

• a coverage indicator showing the percentage of pupils eligible for KS2 assessment that are included in the value added calculation. The coverage indicators also give some indication of schools where the value added measures may be unrepresentative: a low coverage indicator means that information was not available to calculate the value added scores of many of the school's pupils, and so these pupils could not be included in the school value added calculation and;

• a stability indicator showing the percentage of pupils included in the value added calculation on roll at the school for both the KS1 and KS2 tests.