A Venn diagram contrast and comparison is a visual tool for comparing and contrasting two or more objects, events, people, or concepts. It is frequently used to organize differences and similarities in language arts and math classes. This simple diagram helps students understand how two things can be both different and similar at the same time. A Venn diagram can become complicated, but in its most basic form, it is two circles that overlap in the middle. By adding more processes, simple Venn diagrams can be used to compare more than two things.