I got a smart watch for Christmas. It has a ‘compass’ that also shows my longitude, latitude, altitude, and the Atmospheric Pressure in hPA.
So I studied up on the units for Atmospheric Pressure.
Disclaimer: This is crude. I want to get some numbers I can remember.
Pa is an SI unit for atmospheric pressure. It means Pascal. One Pascal is 1 Newton per square meter. hPa is hectopascal. 1 hPa = 100 Pa
The ‘Imperial’ (English) unit would be PSI (pounds per square inch). BTW, 1 PSI is quite a bit, but 1 Pascal isn’t much.
Often the weather person on television give the atmospheric pressure in inches of Mercury (inHg).
1 inHg = 33.9 hPa
.02953 inHg = 1 hPa Low, Regular, and High Pressure
1000 hPa (29.5 inHg) is low pressure.
1010 hPa (29.8 inHg) is ‘regular’ pressure. 1040 hPa (30.7 inHg) is high pressure.
The key is
which direction is the barometric pressure going (rising or decreasing).
Good summary of what graphicacy is, especially early graphicacy in children. ￼
Click to access espresso_22_early_graphicacy.pdf
This definition of graphicacy￼ does not seem to be comprehensive enough to include spatial sense, but is an important subset, or component of, spatial sense and visualization￼. This definition of graphicacy seems to emphasize data visualization.
**Actually there is remediation, but it is just-in-time. There is corequisite support/remediation.
This sounds promising. Students do not like (or, equivalently, are not motivated) to take a semester-long remediation course.
Under this plan, the students
may be taking a similar amount of math, but the (previous) pre-requisite is now a corequisite.
Very good stuff here. Nice mathematics, nice symmetry, nice visually!
Nice paper with an explanation of what is going on by Carmen Melliger
here. Good mathematics!
Nice graphic by Shana McKay from Scaffolded Math.
Good opinion-editorial piece. I think it does deemphasize conceptual understanding problem-solving and may over-emphasize practice, but overall this is a good article.
I like the analogy of doing math in playing a musical instrument.
Catalyzing Change in High School Mathematics: Initiating Critical Conversations
Book released by NCTM in April 2018.
See the page on this site.
Note for teacher education students at W.I.U.
The TEP Handbook has been updated. There are numerous links still existing to the old handbook.
You might use the link to the TEP Handbook at
As of 2-28-18 the TEP Handbook was updated January 2018.
In particular, when writing the reflective paper, we now have
four (4) dispositions.