Mathematics - Fractions - Understanding unit fractions - Fraction Strip Builder

Show a rectangle at the top representing '1 whole'. Below it, the student can divide identical rectangles into equal parts using a slider (2-10 parts). When they select 4 parts, each part is labeled 1/4. They can click to shade parts: shading 1 part shows 1/4, shading 2 shows 2/4. Display the fracti