Make a chart with two rows and a column for each place value. Include a column for the "Ones" place (the whole numbers), one for the decimal point and one for each decimal place.
Write the name of the place value in the first row of the appropriate column. Leave the cell in the column for the decimal point empty or write "Decimal Point."
Write a 0 in the second row of the "Ones" column, then place a decimal point in the next box.
Write one digit in each of the decimal place columns. For example, if your chart names each decimal place through one hundred billionth, the number will look something like this: 0.123456789.
Shade every three rows in a different color so that students can easily distinguish between the different groups, such as the thousandths, millionths and billionths groups.