earcome1
I recently presented a poster and a paper at the 7th ICMI-East Asia Regional Conference on Mathematics Education (EARCOME 7) last May 11-15, 2015 at the Waterfront Cebu City Hotel.

earcome2
Shown above is a picture of me with Frederick K. S. Leung (who was the honorary plenary lecturer) and Catherine P. Vistro-Yu (who was the international program committee chair).

earcome3
The poster and the paper were based on parts of my dissertation with Dr. Vistro-Yu as my advisor. The poster had the title “Assessing Proportional Reasoning Skills and Understanding Using the Water Rectangle Task” and was co-authored with Dr. Vistro-Yu. (A copy of the poster is here. The poster is the one on top in the photograph above.)

earcome4
The paper had the title “Teaching Proportional Reasoning Concepts and Procedures Using Repetition with Variation” and was co-authored with Dr. Vistro-Yu. (A copy of the slides is here. Also shown in the photograph above is the session chair Enriqueta Reston.)

cspc02
During my recent trip to Cebu City, I passed by the Chapel of San Pedro Calungsod near SM Seaside City. (It seems that there is another Chapel of San Pedro Calungsod at the SM Aura Premier in Fort Bonifacio Global City.) They say that the chapel has 100 walls of different widths and heights.

cspc01 Read the rest of this entry »

48d4t12
It is generally accepted by mathematics educators and by scientific calculator companies that in the “correct” order of arithmetic operations, multiplication and division are done from left to right. Thus, 48÷4×12 is evaluated as 144. The Casio fx-82MS and the Casio fx-350ES shown above give this answer. There is, however, some disagreement whenever parentheses are used to indicate multiplication.

My daughter’s high school teacher asked her to evaluate 48÷4(12). My daughter’s answer was 144; her teacher’s answer was 1. What answer is given by the calculators?
Read the rest of this entry »

vwbbaja vwbcust
My wife and I currently have eight Hot Wheels Volkswagen Beetles: Herbie and the Treasure Hunts and the six shown here.
Read the rest of this entry »

vwbth As I was writing this blog post, I was surprised to realize that I had not yet blogged about the Hot Wheels Volkswagen Beetles my wife and I have collected (except for Herbie). This afternoon, I saw three of these Volkswagen Beetles from 2015 and I bought one of them. While I was eating lunch, I was surprised to find a circle flame logo on the front of the card behind the scale model. Although I regularly look for the circle flame logo on the scale models (which the newer regular Treasure Hunts have), I did not see it on the hood of the car.

vwbthcfc Read the rest of this entry »

batmanl2 batmps3
I recently bought a Batman Live Batmobile in black and a pinstriped “1989 Batmobile” with a “black mirror” body. (It may not be obvious from my photograph, but the black mirror paint is sort of like what you get when you mix pewter with motor oil: a rainbow effect.) Both have yellow tinted windows.

oldno55 5alarm
backdraf My wife and I don’t collect fire engines but we’ve bought a few of the weirder looking ones. Shown above left is an Old Number 5.5 from 2007 (not to be confused with the Old Number 5), and shown above right is a 5 Alarm from 2009. The one shown on the left is a recent acquisition: a Backdrafter from 2015. All three are either first or second releases. We also have a 2009 Fire-Eater Treasure Hunt. (Note that the 5 Alarm shown here has a circle flame logo on its side, but it is not a Treasure Hunt.)
Read the rest of this entry »

yotg2 yotg1
My friend Dennis from Australia gave me the Hot Wheels Year of the Goat 2015 car shown above left. I understand that it is exclusively available from Toys R Us. The Carbonic shown above right is a recent acquisition. Read the rest of this entry »

coching1
A book entitled Komiks: Katha at Guhit ni Francisco V. Coching was given to me last Christmas by my friend Allan Sioson, who got the book from Koko Coching’s family. Read the rest of this entry »

dtmothr6
This Dream Tomica Mothra goes well with my Dream Tomica Godzilla.

dtmothr7. Read the rest of this entry »

Follow

Get every new post delivered to your Inbox.

Join 52 other followers