Amy J. Hackenberg is an Associate Professor in Mathematics Education at Indiana University. Anderson Norton is an Associate Professor in Mathematics Education at Virginia Tech University. Dr Robert J. (Bob) Wright holds Bachelor's and Master's degrees in mathematics from the University of Queensland (Australia) and a doctoral degree in mathematics education from the University of Georgia. He is an adjunct ... Read moreprofessor in mathematics education at Southern Cross University in New South Wales. Bob is an internationally recognized leader in assessment and instruction relating to children's early arithmetical knowledge and strategies, publishing four books, and many articles and papers in this field. His work over the last 20 years has included the development of the Mathematics Recovery Program which focuses on providing specialist training for teachers to advance the numeracy levels of young children assessed as low-attainers. In Australia and New Zealand, Ireland, the UK, the USA, Canada, Mexico and elsewhere, this program has been implemented widely and applied extensively to classroom teaching and to average and able learners as well as low-attainers. He has conducted several research projects funded by the Australian Research Council including the most recent project focusing on assessment and intervention in the early arithmetical learning of low-attaining 8-10-year-olds. Show Less