They way the text is worded in the labs makes the concepts very difficult to comprehend. For instance, the text "If we don't pass start its considered 0" is given on Python Numby Slicing. This is a very confusing statement compounded by bad grammar ("its" instead of "it's"). It should be reworded to something along the lines of, "If we do not pass a value for the start position, the slice will start at index 0"