Maimonides Minute – Hilchot Kriat Shma 1:1-3 (Determining what must be said, & in what order)

With this shiur we begin a new series on the laws of saying the Shma in the evening and in the morning. What constitutes Kriat Shma? Why are the paragraphs read in this order? And why does the Rambam give a different answer to this question than the Gemara?