TY  - BOOK
AU  - Orton 
TI  - Learning mathematics : issues, theory and classroom practice 
SN  - 1846840651 
U1  - 510.71 ORT 2007 
PY  - 2007///
CY  - London
PB  - Continuum
KW  - Mathematics
KW  - Study and teaching
N1  - Includes index p.225 - 228
ER  -