**Effectiveness of digital-based interventions for children with mathematical learning difficulties : A meta-analysis** The aim of the study is to meta-analyze empirical evidence about the effectiveness of digital-based interventions designed for students with mathematical learning difficulties. The material here presented includes: 1. *prisma.png* - the Prisma flow-chart that summarizes the stages of the literature search carried out to select eligible studies. 2. *review.csv* - the main characteristics of the selected studies are reported. 3. *data.csv* - the data need to compute the effects size of the selected studies are presented. Single studies can contribute with one or more effects. In the latter case, the type of dependence between effects within the same study is specified. 4. *Supplmental_Material.pdf* - step by step instructions and comments with R code syntax to reproduce the meta-analysis results. 5. *Supplemental_Material.R* - plain R code syntax to reproduce the meta-analysis results. For further information regarding the meta-analysis consider: <br/> to be added after review For further information regarding the data and supplemental material consider: <br/> to be added after review