A Focus on “Math in Focus”

One of the oldest proverbial sayings in the English language is, “You can’t teach an old dog new tricks.”  If there are any of you out there that still insist on calculating math solutions with a slide rule (or who even remember what a slide rule is!), you know what I mean. As the march of time presses on, I tend to resist change, especially for change for change’s sake. If something has worked well