live math

I prefer to casio ti. The students found it easier at least until end.
Write expressions as they stand, what a dream !!!!
What are our rules to further calculations, trig tables and log !!
(For connoisseurs, this little yellow book "and the bouvard Ratinet")
And yet, we have built bridges, stolen planes, sent men into space
with our rules calculations.
But progress will allow us to go further and the CASIO are tools of progress.