AU - Rankhumisem, Mmushetji Petrus. ID - 120747 OP - pp. 361-375 T1 - Alleviating alternative conceptions and conceptual difficulties of energy in grade 10 mechanics using contextual-conceptual-formal understanding [Article] UL - 1 http://search.shamaa.org/fulltext.gif http://journals.ju.edu.jo/DirasatEdu/article/viewFile/5630/5055?target=_blank Full text (PDF)