Advance Excel Essentials is the second part of Excel Essentials by David K. Ewen, M.Ed. David K. Ewen, M.Ed. is a professor, author, speaker, talk show host, film producer, and publisher. He is the founder of Ewen Prime Company and has been in media production since 1994. In 2004, he founded Forest Academy and has toured the seven states of New York and New England on entrepreneurial studies. David is a consulting professor at the Saylor Academy in Washington, D.C. and linguistics professor in Tokyo, Japan.