**Teaching fractions in elementary school: A manual for teachers**

Saturday, January 01 16 / pdf

... classes of ordered pairs of integers is abysmally unsuitable for teaching at the level of the 5th or 6th grade. ... 17 + 1612 13. 2 5 9 + 7 8 = 2 + (5 9 + 7 8 ... in the 8th grade math ...