Phosphorus is a chemical element with symbol P and atomic number 15. As an element, phosphorus exists in two major formsâ white phosphorus and red phosphorus âbut due to its high reactivity, phosphorus is never found as a free element on Earth. Instead phosphorus-containing minerals are almost always present in their maximally oxidised state, as inorganic phosphate rocks.
Ages & Stages â Preschool Children. Three and four-year-old children are often called preschoolers. Preschool children want to touch, taste, smell, hear, and test things for themselves. They are eager to learn. They learn by experiencing and by doing. Preschoolers learn from their play.
Preschool Activities and Crafts. First-School features free fun preschool lesson plans, educational early childhood activities, printable crafts, worksheets, calendar of events and other resources for children of preschool age. The preschool crafts, lesson plans and activities are appropriate and adaptable for toddlers, preschoolers and kindergarten level (ages 2 to 6). First-School's content is ideal for home schooling, preschool and kindergarten teachers, daycare, child care providers, after-school and babysitters.