A 100-number chart is a ten-by-ten grid that lists a set of 100 integers in order from least to greatest. In a typical chart, the number one is at the top left corner, while the number 100 is at the bottom right corner.
The numbers increase in value from left to right. The next row begins where the previous row left off. Occasionally, the chart begins with zero and ends with 99. Other variations on the 100 number chart include a partially blank chart, which is used with the expectation that students fill in the blanks, and a rounding chart that helps students learn how to round to the nearest ten.