This  resource makes a GREAT center for comparing numbers!  Kids can use numbered playing cards, dice, coins, or dominos to choose 3 numbers.  Then they place them in order from least to greatest in the boxes at the top.  Finally, they write three correct numerical sentences using the <,>, and = signs to compare any two numbers.  If they get two of the same number, they should put them in the same box and use the = sign to describe their relationship.  Print on cardstock and laminate so kids can use dry erase markers to play over and over again!