Bill,Two quick comments regarding grade 6… then three questions:Comment 1) On page 4, the dots on the first and third dot plots are not aligned, which makes the graph confusing to read and interpret. The same thing occurred on the dot plot appearing on page 13 of the Data Progression.Comment 2) Also on page 4, there is a typo in the caption under those dot plots. It currently reads, “Students distinguish between dot plots showing distributions which are skewed left (skewed toward larger values), approximately symmetric, and skewed right (skewed towardsmaller values).” The skews are reversed.Question 1) In the progression, a dot plot is defined as synonymous with a line plot. This is consistent with the examples shown. Does this mean the sixth grade does not have to address scatter plots at all? I had interpreted dot plots to include scatter plots, but the examples given lead me to think scatter plots are “owned” by 8th grade, correct?Question 2) Some of the box plots (bottom of p. 5 and middle of p. 6) include outliers dealt with by disconnecting those points from the whisker. Do sixth grade students need to learn the very arbitrary “1.5 times the IQR above the upper median” rule for determining whether a data point is far enough to be considered an outlier? Teaching this convention seems far too detailed and isolated from the larger focus of the data standards and the focus of 6th grade to justify the time and confusion!Question 3) The “Middle School Texting” graph (bottom of p. 5) has no lower whisker. I have never seen that before. I thought, by definition, the bottom quarter of the data points were represented on a whisker? The only time I have seen a box and whisker that is missing one whisker is when that entire quartile is comprised entirely of “outliers” that are represented by dots instead of a whisker. Please explain why there is no lower whisker for this graph. Providing that explanation, along with the actual data, would really help to clarify this content for 6th grade teachers! I think, because sixth grade teachers are still generalists (certified in elementary ed., not math… at least in New York), 6.SP.5 will be the single most professional development demanding standard. To that end, anything you can include in this document would be greatly appreciated! As always, thanks for taking the time to support us.Brian