What is the IDACI?
The income deprivation affecting children index (IDACI) measures the proportion of all children aged 0 to 15 living in income-deprived families in different local areas (called 'lower-layer super output areas', or LSOAs) across England. Each LSOA usually has between 1,000 and 3,000 residents or 400 to 1,200 households.
Each LSOA gets an IDACI score of between 0 and 1. For example, a score of 0.38 would mean that 38% of children aged 0 to 15 live in income-deprived families in that area.
The rankings are divided into 6 'bands' that are assigned additional funding (A to F), with LSOAs in band A being the most deprived. Pupils in the least deprived 62.5% of LSOAs (band G) will not be assigned deprivation funding. Read more about the different bands
