Abdul Halim Abdullah and Nur Liyana Zainal Abidin and Mahani Mokhtar, Using Thinking Blocks to Encourage the Use of Higher Order Thinking Skills among Students When Solving Problems on Fractions . journal = {International Journal of Educational and Pedagogical Sciences}, [online]. World Academy of Science, Engineering and Technology. January 2017, vol. 122(2). 342 - 348 [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/10006278.