Venn diagrams are a quick, easy and fun way to introduce students to the concept of comparison-contrast writing.
They’re great practice if you’ve already done so, and especially perfect for visual learners.
one as a whole-group activity to explain things, (compare mittens and
gloves) and then give students a choice of the other two. (Compare two
characters in The Mitten, or compare the story The Mitten with Jan Brett’s other story The Hat.)