Experiential learning
In geometry, the spiral of Theodorus( also called square root spiral, Einstein spiral or Pythagorean spiral) is a spiral composed of right triangles, placed edge to edge. The spiral is started with an isosceles right triangle, with each leg having unit length.
Students of grade 9 explained the existence of irrational numbers by spiral root activity. They showcased their creativity by making beautiful patterns, shapes, figures to this activity.