Mental mathematics.
Clausen-May, Tandi.
Claydon, Helen.
Ruddock, Graham.
National Foundation for Educational Research in England and Wales.
[Windsor] : NFER-NELSON Education,
[1999]
Teacher's guide -- At a glance guide ... -- 1 sound cassette -- 20 test booklets -- 2 group record sheets -- 1 letter/order form.