Is there a difference between the union of sets and the intersection of sets? The teacher uses a Venn diagram to illustrate how to determine what makes a union and what makes an intersection of sets.

A very short explanation of what makes a relation: a set of ordered pairs.

The union of two or more sets is well defined in this two-and-a-half-minute video. A clear definition is provided alongside a concrete example, which makes for good teaching.

A straightforward illustration of a Venn diagram. Intersection is what they sets have in common, and the union is all the elements of the sets. The diagram certainly helps you see what this means.

In Algebra 1 the concept of relations is studied. As a starting point to this unit, guide your learners to identify algebraic relations and discriminate the domain and range within an ordered pair though this informative video. Assign...