Marjorie M. Petit / Matthew F. Wyneken / Robert E. Laird
Librería Samer Atenea
Librería Aciertas (Toledo)
Kálamo Books
Librería Perelló (Valencia)
Librería Elías (Asturias)
Donde los libros
Librería Kolima (Madrid)
Librería Proteo (Málaga)
This book makes math education research on ratios & proportions readily accessible to pre-and in-service teachers of grades 6-8. Using extensive samples of student work and based on research gathered in the OGAP, this easy-to-use book demonstrates how students develop understanding and fluency involving ratio & proportion.