Children with expressive language disorder have difficulty conveying or expressing information in speech, writing, sign language or gesture. (For preschool children, the difficulty expressing themselves in writing is not evident, as they have not started formal education.)
Rectangles have longer sides than any type of square. Opposite sides of rectangles are of equal lengths. All sides of squares are of equal lengths. Rectangles have longer sides than any type of square. Opposite sides of rectangles are of equal lengths. All sides of squares are of equal lengths.
1 You can fit a square in a rectangle whose width is the same as the width of the square given that the length of the rectangle is longer than the width.  The second is the Fibonacci rectangle. This special rectangle adds the requirement that the length to width ratio be 1.618.