Browsing All Posts published on »April, 2017«

Connections, please

April 26, 2017


“Is that all we have to do?”   The teacher had told them that to answer this question they needed the distance formula and the Pythagorean Theorem. They’d used the distance formula on the two points they were supposed to figure out the distance between… and were wondering whether they were done, because they hadn’t […]

Single lessons… out of context…

April 25, 2017


I’m revising and remixing an “order of operations” lesson. IT’s all well and good, but … if you haven’t been working with me, do you already know about a good way to break the problems down as you go?   Do you understand that “do the parentheses first” is more complicated than that — that […]

Meaning is great, but they forget.

April 18, 2017


There is/was a twitter thing on integers today.   Someone spent two weeks talking about meaning, and then … students went to “adding the opposite.” I suggested that sometimes the meaning background made the ‘rule’ easier to remember.    I had earlier in the day recalled that azaleas and rhododendrons like acid soils, and had reflected […]

Pre-emptive concept development

April 17, 2017


One of the things that wowed me about my Java I course was the ability of our instructor to teach concepts pre-emptively, consciously laying groundwork with “future common errors” in mind. We worked with the concept of “object orientation” and variables being the address where a value lived, not the value itself. He kept coming […]


April 14, 2017


We’re singing it in choral union … but not the version imprinted in my memory.  It’s on Pete Seeger’s 1963 _We Shall Overcome_ live album without the words South Africa. I wondered what the lyrics mean — the title is onomatopoeia (yes, I can spell that — “on” then as if you were spelling “tomato” and […]

Data manipulation

April 13, 2017


Seems my “Mathia X Review” post has replaced my “forgot the magic pen” post as the one that keeps attracting traffic.  It was intentional – I tagged it — while the “magic pen” gets people looking for how to make a square root sign on the computer 😉 I also decided *not* to take the […]

The power of motor memory

April 12, 2017


Changing 8 percent to a decimal… it’s .0008, right?  You take 0.08 and divide it by 100. I thought the “do it once, not twice” would work but then… “Move the decimal two places” with a very, very, very careful and explicit Placing Of The Point, explaining that 8 dollars is not the same as […]