This paper reports on a seven-year longitudinal study. In 1998 an extensive investigation of the nature of growth in literacy and numeracy across the years of primary school was established at ACER as a national longitudinal study. It was intended that scales of developing literacy and numeracy achievement would be developed within this study, making it possible to show growth from the first year at school until the end of primary school.
Meiers, M. (2008). A Longitudinal Study of Growth in Literacy and Numeracy in the Primary School Years. https://research.acer.edu.au/monitoring_learning/12