Amazon calculates a product’s star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers, and factors that establish reviewer trustworthiness.
Reviewed in the United States on February 18, 2015
As dysfunctional as our national lawmakers presently are it wasn't always this way in Congress. I think it is important for youngsters to realize Congress is suppose to fulfill an important role in governing the nation. This excellent book takes out the politics and does a very fine job of explaining what the U.S. Congress should be doing and why it is so important (or was until just recently!!). Teachers and homeschooling parents will want to use this book as a resource for government studies.