Items where Author is "Abdul Halim, Ummi Kalsom"
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Understanding of function and quadratic function among secondary school students in Selangor / Teoh Sian Hoon, Parmjit Singh and Ummi Kalsom Abdul Halim. (2018) Asian Journal of University Education (AJUE), 14 (1). pp. 77-88. ISSN 1823-7797