Doerr and Zangor (2000) posited a slightly different view of black
box uses of calculators.
Not exact matches
They acknowledged that in some situations black
box use was detrimental to helping students develop mathematical understanding, but also gave examples
of classroom situations where students can
use graphing
calculators to make sense
of mathematical concepts before doing hand computations.
Simply
use the slider to enter your income and deductions and find your estimated refund or amount due displayed on the right side
of the
calculator; or you can enter your tax information manually in the text
boxes.
Your local moving company should be able to help you figure out how many
of each type
of boxes you should need, or you could find and
use an online packing
calculator.