The document discusses the ICT Development Index (IDI) which is published by the International Telecommunication Union and measures the development of information and communication technology (ICT) in different countries. It is based on 14 indicators grouped into three clusters that measure access, use and skills. The document outlines the specific indicators used to measure each cluster and provides statistics on global progress in ICT connectivity and use, as well as existing digital divides. Finally, it discusses concepts like the knowledge society and how ICT can be used to support teaching and learning, listing different types of ICT resources and sources.