In his 1963-speech “I Have a Dream”, Dr. Martin Luther King Jr. states the purpose of the speech between lines 1-3:
“<em>I am happy to join with you today in what will go down in history as the greatest </em><em>demonstration for freedom in the history of our nation</em>.”
In these lines, MLK is giving the audience the reason for their presence in that March of August 28th: the freedom of African-Americans.
In order to support his speech, MLK cites some U.S seminal documents. Some of them are the Emancipation Proclamation in line 5:
“<em>Five score years ago, a great American, in whose symbolic shadow we stand today, signed the </em><em>Emancipation Proclamati</em><em>on.</em>”
Also, in subsequent lines (line 20-22), he cites the U.S. Constitution and the Declaration of Independence.
“<em>In a sense we’ve come to our nation’s capital to cash a check. When the architects of our republic wrote the magnificent words of the </em><em>Constituti</em><em>on and the </em><em>Declaration of Independence</em>.”
You pretty much just say something simple like, "My child will not be attending class today. Because (put your reason) please excuse my child's absence. Sincerely (your name)" And put your benifit within the letter
It is inevitable you can't stop someone from judging something and that leads to disrespect. With all of our different beliefs and cultures, there are a wide plethora of ideas and you can please everyone. It is not about trying to stop disrespect completely it's about trying to see it and do something about it.