คำบาล จ. A Development of Learning Package in Topic of Linear Equation with One Variable Using Inquiry Method (5Es+D) for Mathematics Problem Solving Ability for Grade 7th Students. Pitchayatat [Internet]. 2019 Dec. 27 [cited 2024 May 17];14(3):13-22. Available from: https://so02.tci-thaijo.org/index.php/Pitchayatat/article/view/237028