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.
For the key group of target children (who were 3 and 4 years old at baseline), enrollment in treatment communities was 55.6% compared to 11.7% in control, resulting in a program impact of 43.9 percentage points (or 375%) in preschool enrollment.3% of teachers are female and the average age is 33. The average number of years of education is 6.2 years, exceeding the minimum of 4 years required by the program for participation as a teacher. More than half of teachers have a child enrolled in the preschool.