What did Regan do ? <| sep |> No one does these calculations by hand in practice absolutely not true , and kind of besides the point even if it were . First of all , saying that no one does these computations therefore we shouldn ' t teach the algorithm seems absurd to me . With that logic , we should never teach kids the addition , multiplication , or long division algorithms . I admit that there are arguments in favor of this approach , but this belief certainly puts you in the minority among educators . I strongly disagree . The algorithm is trivial . which is why the animation is completely unnecessary . If this animation is necessary , it ' s because the students can ' t follow a simple algorithm . <| sep |> could you do that mockup showing what a bezelless 4 . 7 compared to the current 4 iPhone SE