Have students practice writing equivalent forms of numbers as fractions, decimals, or percents using these math center activities. A set of 96 cards in 24 matching sets can be used to create math centers games or used with two extension activities.Money models are used with the half, fourths, tenths, twentieths, and hundredths and fraction models are use with fifths, thirds, and eighths. The Percent Model Work Mat is used to model the equivalence of numbers by scaffolding students from a hundr