TY  - BOOK
AU  - Mwale, James
TI  - The effective use of problem based learning to improve pupils understanding in writing chemical fomulae and balancing chemical equations
AV  - THESIS/STUDENT 
PY  - 2011///
CY  - Kitwe
PB  - Copperbelt University, School of Mathematics and Natural Sciences, Department of Mathematics and Science Education
KW  - SCIENCE--EDUCATION
KW  - EDUCATIONAL TESTS AND MEASUREMENTS
ER  -