Krastiņa E, Sondore A, Drelinga E. ANALYSIS OF METHODOLOGICAL APPROACHES TO PROBLEM SOLVING SKILL IN MATHS TEXTBOOKS FOR GRADES 5-6. SIE [Internet]. 2019 May 21 [cited 2024 Nov. 22];2:255-66. Available from: https://journals.rta.lv/index.php/SIE/article/view/3852