There are certainly many ways to have students compare things and to represent that comparison visually. Even more well-known than the comparison-contrast chart is the Venn Diagram . The Venn diagram is also very useful, as long as we keep in mind that the real value of a Venn is in the DOING of it...they work best when we have students, not teachers, determining what the relevant similarities and differences are between two or three concepts, people, places, or ideas. The website offers several types of comparison-contrast charts and Venn diagrams, which can be downloaded and printed out from the links below.
Five main types of organizers
Graphic organizers are valuable instructional tools. Unlike many tools that just have one purpose, graphic organizers are flexible and endless in application. One common trait found among graphic organizers is that they show the order and completeness of a student's thought process - strengths and weaknesses of understanding become clearly evident. Many graphic organizers show different aspects of an issue/problem - in close and also the big picture. Since many graphic organizers use short words or phrases, they are ideal for many types of learners, including English Language Learners with intermediate proficiency.
Although five main types of organizers are mentioned in this piece, many others exist, or will soon be created. See examples below.