This is a set of 17 scales which cover ALL 25 CCSS Math Standards. Some scales are for just 1 standard, while others are for 2 or more similar standards. These are 0-4 scales, with 3 being the proficient level of mastering the standard. All 17 of these scales are also listed for sale individually in my store. However, by purchasing the entire set at once, you save over 23% which is the equivalent to getting 4 scales for free! :) Please check out my numerous other scales (other grades and subjects) as well.