This document summarises key findings from the quantitative strands of a review of the Education Endowment Foundation (EEF) evaluations that had reported from the establishment of EEF in 2011 up to January 2019. The quantitative strands summarised include meta-analyses of effect sizes reported for attainment outcomes and descriptive analyses of cost-effectiveness and attrition. Additionally, descriptive univariate analyses of the explanatory variables used in the review are summarised. Complete findings can be found in the main report. The review conducted qualitative interviews to explore perceptions on effective scale-up and developed and piloted an IPE quality measure, and these are reported separately. [For "Review of EEF Projects. Evaluation Report," see ED625480. For "Review of EEF Projects. Technical Annex," see ED625484. For "Review: Scale-Up of EEF Efficacy Trials to Effectiveness Trials," see ED625479. For "Review: EEF Implementation and Process Evaluation (IPE) Quality Pilot," see ED625478.]