The Global Alliance to Monitor Learning works on the technically more sophisticated learning outcome-related indicators, primarily on minimum proficiency in reading and mathematics, adult literacy and digital literacy. It began inviting countries in late 2018, with the prospect of developing into part of the TCG structure. The Inter-agency Group on Education Inequality Indicators works on indicators based on data from household surveys but has not yet included countries. The forum provides political leadership, guidance and recommendations on implementation and follow-up, tracks progress, encourages elaboration of coherent policies informed by evidence, science and country experiences, and addresses new and emerging issues.