How about putting actual quantities, either measurements or weights on each ingredient. (epicurious.com)
The amount of air in your flour (spooning vs. scooping vs. packing in flour) and the type of flour you use will change the actual quantity in that 1 cup measure. (affairsofliving.com)
And by now, he gets that the final number is the actual quantity of objects he has. (babycenter.com)