Mi Primer Libro de Numeros Tapa blanda - 2002

Patti Barber has been a primary school teacher, and a deputy head teacher. A lecturer at The University of London's Institute of Education, she is responsible for elementary mathematics curriculum development. Her publications include Nursery Mathematics and Foundation Mathematics.

Mandy Stanley illustrated both the I Can Count and I Can Spell series and and the award-winning First Number Book and First Word Book, which were both Smithsonian magazine Notable Books for Children. She trained at Great Yarmouth College of Art and Design and Nottingham Polytechnic, where she gained a degree in fashion. She worked in children's wear for three years - since then, among other things, she has produced nursery sets for Mothercare, an award-winning range of toys for Boots and a range of books and other resources based on the 'Babe' character.

Ann Montague-Smith is a professor of early education at University College, Worcester, in the U.K. She was a primary school teacher before becoming an early education specialist in mathematics.