I uploaded a new freebie. It is a center focused on place value, expanded form, and standard form. Students cut out cards that say thousands, hundreds, tens, and ones. They put these cards face down. They flip one over, and roll a die to determine what they will write on their paper. They do this four times until they create a four- digit number. The worksheet guides them to write this number in expanded form and in standard form. Click here to get it.