Fatisa Y, Br Galingging EA. Design and Trial of Electronic Smart Worksheets Based on POE (Predict, Observe, Explain) on Acid-Base Topic. j.tadris.kimiya [Internet]. 2021 Jun. 30 [cited 2025 Dec. 18];6(1):51-6. Available from: http://103.55.33.27/index.php/tadris-kimiya/article/view/9853