Students physically manipulate materials to build decimal relationships. Start from one ball of playdough and make tenths, hundredths, thousandths. Start from one square of paper and fold tenths, hundredths. Start from one metre strip and fold tenths, hundredths, mark thousandths. Perceptualize Decimal Fractions as part of a whole..
The BERCS cards for decimals are built backwards from the paper model we use to build to ten thousand. The little man with the magnifying glass is reminding you that we enlarged the one.
Relate tenths and hundredths as images to the fraction and decimal notation they represent.