Hashtag Math

Last year as a test review, I asked my students to categorize problems.  Beyond knowing the mechanics, I want my students to know the when and why. Thus I asked them to tell me what "big theme" each problem represented.  With a set of review problems, I began to #hashtag the problems. Two examples are shown below:I have no scientific research showing that this helps my students make connections and categorize concepts, but they certainly remembered and enjoyed hashtagging math problems!  This is a technique I plan on continuing and is worth considering beyond just review.  At minimum, hashtagging in class was unique, so it stood out as something special.  Their favorite was #factoredform, so I wonder how long until its trending?