These folks have all written important works on human ethics and values. Robert Cole wrote about values education specifically. John Dewey wrote about education for the purpose of citizenship and engagement for the common good.
For an introductory/undergraduate text I've used Vincent Ryan Ruggiero's Thinking Critically About Ethical Issues. I think it's in the 7th edition, which means it has had some staying power.
OK: Alasdair MacIntyre, After Virtue, Notre Dame: University of Notre Dame Press, 1981, 2nd edn. 1984, 3rd edn. 2007 // Dependent Rational Animals: Why Human Beings Need the Virtues. Chicago: Open Court, 1999. // Three Rival Versions of Moral Enquiry. The Gifford Lectures. Notre Dame: University of Notre Dame Press, 1990.
Martin Rhonheimer, La prospettiva della moral. Fondamenti dell'etica Filosofica. Armando, Roma 1994.
R. Spaemann, Basic Moral Concepts, trans. T.J. Armstrong. London: Routledge, 1990 (1982). //
I am using also books of Michael J. Sandel (also good to combine it with Charles Taylor's) like The Case Against Perfection. It is relevant with the culture where I live. However, I am familiar also with more liberal poles like those books written by Peter Singer.