My father actually did this to me when I was a small child. This is how I gained the confidence to swim. The only difference being that my father threw me in a pool that was clean and sanitized.
In the same line of reasoning, when I attended public school back in the fifties, the 3 R's I learned was reading, 'riting and 'rithmatic.
Today the waters of our humanistic secular public school system is polluted with the 3 R's of radical agendas, revisionist history and relativism.
We all want our children to learn how to swim, but not in shark infested, polluted waters.
"This is what the Lord says: Do not learn the ways of the nations..." -Jeremiah 10:2