Describe four main philosophies of education - perennialism, progressivism, essentialism, and reconstructivism - and at least one philosopher who influenced the development of the philosophy, and the timeframe in which it was developed. Be sure to include the following: A description for each of the philosophies of education (origin, proponents, and main tenets).  A philosopher associated with each philosophy and the timeframe in which it was developed. How each philosophy aligns with NAEYC standards and the child-centered approach.