Okay, well I am not running a remedial course here.
But for starters, the federal appeals court struck down Obama's illegal, unconstitutional executive order attempting to place illegal aliens beyond enforcement even though he is bound by the constitution to carry the laws of the land into effect. A divided Supreme Court let appeals court ruling stand - ie. the executive order was blocked.
http://www.cnn.com/2016/06/23/politics/immigration-supreme-court/index.html
Nice try but no. DAPA was not an executive order.
https://www.thoughtco.com/executive-actions-versus-executive-orders-3367594