In this photo, we've just glued some items from our craft bin onto index cards with the right number. Another idea would be to place an index card labeled with a number in a cup (Dixie cups would work well!), and the child can count in the correct number of beans, beads, buttons, or whatever into the cups to help reinforce 1 to 1 correlation and number recognition.
It may look like all we do in our preschool is count, but that's not true. We read too. ;) Seriously, though, this particular girl likes math, but has no interest in learning letters, let alone their sounds!