One-third: take a square piece of paper and fold it diagonally, up and down, fold it along the connecting line between the left midpoint and the lower right corner, press out the crease at the intersection with the diagonal, fold the lower paper upward just after the intersection, align the two sides, then fold the upper paper in half at the bottom, open it, and the bisector will be folded in half. Quarter: Take a square piece of paper and fold it in half along two diagonal lines, fold it in half along the midpoint of two groups of opposite sides, fold it once along the midpoint of one group of opposite sides and then fold it in half. One-sixth: find a rectangular piece of paper, divide the long side of the rectangle into three parts, and fold the long side of the rectangular paper in half. The area of the two small rectangles in the middle is 1/6.

Origami can help improve children's math scores, give them a three-dimensional sense and improve their hands-on ability.