The International Early Learning and Child Well-being Study (IELS) was a collaborative effort between participating countries and the OECD secretariat.
The development of this report was guided by Andreas Schleicher and Yuri Belfali and managed by Rowena Phair. The lead author of the report was Javier Suarez-Alvarez, with chapters contributed by Lauren Kavanagh (Chapter 3) and Malek Abu-Jawdeh (Chapter 4). The publication was edited by Elizabeth Zachary and designed by Fung Kwan Tam. Administrative support was provided by Valentine Bekka and Matthew Gill. Communications support was provided by Rachel Linden.
To support the technical implementation of IELS, the OECD contracted an international consortium of institutions, led by Maurice Walker at the Australian Council for Educational Research (ACER). The consortium also included the International Association for the Evaluation of Educational Achievement (IEA), led by Anja Waschk, and cApStAn, under the lead of Roberta Lizzi.
To help to ensure that the study was rigorous and valid, IELS was guided and supported in its work by a Technical Advisory Group (TAG) and a Measurement Advisory Group (MAG). The members of the TAG were Iram Siraj (Chair), Rosemary Cahill, and Szilvia Papp. The members of the MAG were Ray Adams, Alla Berezner, Dan Cloney, Wolfram Schulz, Maurice Walker, and Nathan Zoanetti.
This report was prepared in close collaboration with the Estonia IELS team, of which Tiina Peterson from the Estonian Ministry of Education and Research was project lead. Anne-Mai Meesak and Lauri Veski, from Innove, provided feedback on earlier chapter drafts; their help in improving this volume is gratefully acknowledged.