World History First Week of School 2018-19

For classroom discussion:
Does the First Amendment to the Constitution protect the right of freedom of speech?   Is the right to kneel down during the National Anthem to protest perceived civil rights disparities in America protected by the first amendment?  Are your rights to protest the same at school and work the same as the right to protest as a citizen on the street?  
Why is there controversy between President Trump and some players in the NFL and NBA?  What do you think?