To explore why (in first/second grade) we can’t subtract a larger number from a smaller number we explored with dice. We rolled for an initial sum and then wrote that as the minuend. We rolled again for the subtrahend which had to be smaller than the previous number since the subtrahend is subtracted from the minuend. When we saw the equation 4-9=__ we realized we had to roll again to find a lesser subtrahend.
We also used Wiki-sticks to form our spelling words based on our differentiated lists and our phonemic principle 'est'!