K. Sudpan, W. . Yamsang, and N. Yamsang, “The Effects of Mathematics Learning Using the KWDL Technique on the Problems of Addition, Subtraction, Multiplication, and Mixed Division of Fractions and Mixed Numbers on the Learning Achievement of Prathom Sueksa Six Students ”, OJED, vol. 16, no. 2, p. OJED1602005 (15 pages), Oct. 2021.