Some good ideas of how to compare and contrast that move beyond venn diagrams.
Compare and Contrast Review
Three Compare and Contrast Review sheets for elementary students. Includes stories and graphs for comprehension. Students read the short essays then chart comparisons and contrasts on graphs. Uses relationship words for comparisons and contrasts. Great for in-class practice or assessment, as well as homework assignments. $2.00 Grades 2+
How to Write a Comparison and Contrast (Writer's Process)
A step by step, scaffolded approach for teaching your students how to write a four-paragraph comparison and contrast essay. There is a writing model from which students complete a graphic organizer to guide them in deconstructing the model essay. This process helps students to intuit the structure of a comparison & contrast essay.
Comparatives and Superlatives
This page offers an excellent selection of free ESL EFL teaching activities, games, worksheets and lessons about comparatives and superlatives.