Arrays - Teaching Tips
Talk about why you wouldn't want to create a variable when you have lots of related data (such as the pixels in a picture or samples in a sound or grades for a student). You could create a variable for each grade (grade1, grade2, grade3, grade4) but a better way is to use an array of grades. With an array you can give one name to a collection of data and still access each element using an index (grade, grade).
You can point out real arrays such as lines of people, a game board, chairs in an auditorium, and egg cartons.
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