The Ministry of Education (MEQ) annually calculates two deprivation indices for the 69 school service centers and linguistic school boards, namely: * the Socio-Economic Environment Index (IMSE), which consists of the proportion of families with children whose mothers do not have a diploma, certificate or degree (representing two-thirds of the weight of the index) and the proportion of households whose parents were not employed during the week of Canadian census reference (representing a third of the weight of the index) .* The Low Income Threshold Index (SFR) corresponds to the proportion of families with children whose income is near or below the low income cutoff. The low income cutoff is defined as the level of income at which families are estimated to spend 20% more than the general average on food, shelter, and clothing. It provides information that is used to estimate the proportion of families whose incomes may be considered low, taking into account family size and place of residence (rural region, small urban area, large agglomeration, etc.). For the 2021-2022 school year, the socio-economic data used are extracted from the 2016 Canadian census and relate to the situation of Quebec families with at least one child aged 0 to 18. Depending on their geographical position, these families are grouped in one of the 3,680 settlement units established by the Ministry. The annual school indexes are grouped in decile order in order to locate the relative place of the school among all public schools, for elementary and secondary education. Note that schools may include more than one school building, that no index is calculated for school boards with special status (Cree, Kativik Ilisarniliriniq and du Littoral) and that only schools with 30 students or more are selected (without a MEQ-MSSS agreement). For the 2021-2022 school year, 703 primary schools and 194 secondary schools are in deciles 8, 9 or 10 according to the IMSE index and make up the group of schools called in more disadvantaged areas. These schools welcome a total of 154,396 and 106,147 students respectively, representing 30% of the public network enrolment for each of these two levels of education.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**