Data Camp has a series of videos in relation to data, how to analyse your data right though to cleaning your data. An excellent resource that I have used with middle school students.
To further reinforce this, we did an in class activity where students were given two sets of data, which had been collected in different ways. One was qualitative and the other quantitative. The students had to organise the data collected and present it in such a way as the information collected was relevant. They found this process very frustrating at times, however this also allowed them to determine how important it is to collect the data in the appropriate way to start with.
#cserApps4An Introduction to Cleaning Data in R an introduction to cleaning and editing data in R, including an introduction to understanding the structure of your data as well as visualizing your data datacamp.com
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