Bringing out the algebraic character of arithmeticAnalúcia Dias Schliemann, Analucia D. Schliemann, David W. Carraher, Barbara M. Brizuela, Anal£cia D. Schliemann, B rbara M. Brizuela · First published 2005Open the Tome
"To understand is to invent"Barbara M. Brizuela, Harvard University. Graduate School of Education · First published 1999Open the Tome
