Resources for learning mathematics are part of our total environment, natural and man-made. The “mathematical content” of our natural environment is much the same for all of us, wherever we happen to be located. The shape of the sun; the apparently changing shape of the moon; daily and seasonal patterns of shadows; regularity and symmetry in crystals, leaves, flowers, and seeds; experiences with water, such as reflections, waves and ripples; – these are freely available to all.