From: Mark Lawton (markslawton@hotmail.com)
Date: Wed May 04 2005 - 09:50:45 PDT
Message-ID: <BAY104-DAV13CEB3EE181C165655639EA6190@phx.gbl> From: "Mark Lawton" <markslawton@hotmail.com> Subject: relativity Date: Wed, 4 May 2005 09:50:45 -0700
Paul,
I would like discussions of
A: why can't a moving flash light produce light moving faster than the speed of light (After all, sound inside a moving train moves faster than the speed of sound with respect to the earth. This is hard to explain to students since they can't comprehend that light doesn't require a medium.)
B: why can't two things happen simultaneously in a universal time frame. (How does one explain to students that there is no universal time frame.)
C: Why does the traveling twin come home younger than the earthbound twin. (I actually have twins in my class and one didn't want to be the older one.)
D: I know this requires general relativity, but how does the acceleration that the twin experiences when she turns around to return to earth affect the situation.
-Mark
-----Original Message-----
From: pinhole@exploratorium.edu [mailto:pinhole@exploratorium.edu]
Sent: Wednesday, May 04, 2005 12:20 AM
To: Pinhole Listserv
Subject: Pinhole Digest #1743 - 05/04/05
Pinhole Digest #1743 - Wednesday, May 4, 2005
Job posting for math at new charter school
by "Blake Wigdahl" <blakew@exploratorium.edu>
earthwatch opportunities
by "Eric Friedman" <mcelover@yahoo.com>
Learning Studio CLOSED May 4-6, part of Sat. 14th
by "Exploratorium Learning Studio" <studio@exploratorium.edu>
NOVA Evolution videos
by <Btflaig@aol.com>
special relativity
by "Paul Doherty" <pauld@exploratorium.edu>
----------------------------------------------------------------------
Subject: Job posting for math at new charter school
From: "Blake Wigdahl" <blakew@exploratorium.edu>
Date: Tue, 3 May 2005 08:43:47 -0700
They are seeking math and science teachers. Blake
XCEL Academy - a new charter high school in San Francisco (opened in Fall 03) is seeking experienced high school teachers to join our faculty for the 2005-2006 school year.
The mission of the Cross Cultural Environmental Leadership (XCEL) Academy is to support high academic achievement and equity by fostering environmental literacy and leadership among culturally diverse youth. XCEL Academy offers high school students opportunities to examine the connections between natural science, urban ecology, environmental justice and cultural diversity. Our goal is to prepare students to think critically and become life-long learners who are leaders for sustainability and environmental justice. Please see our website at xcelacademysf.org for more information about our new school.
XCEL Academy values:
• Commitment to high academic achievement and equitable outcomes for all students
• Environmental education linked to social and environmental justice
• Education that emphasizes personal connections and a supportive environment
• Multiple ways of teaching and learning and multiple means of assessment
• Critical thinking pedagogy
• Supportive, caring teaching & learning environment for all members of our school community
Desired candidates possess the following:
• A secondary teaching credential
• Strong teaching background with low-income youth of color
• Strong classroom management skills
• Experience with second language learners and secondary literacy development
• Experience using the environment as an integrating context to teach
• Experience implementing anti-racist, multi-cultural and/or community building curriculum
• Strong understanding of developmentally appropriate high school curriculum
• A relentless commitment to the work of co-creating a new urban charter high school
Additional desired skills include:
• Fluency in a second language
• Experience with service learning
• Experience teaching an advisory class
• Experience integrating technology into educational curriculum
• Demonstrated commitment to environmental sustainability and social justice
Incentives of working at XCEL Academy:
• Salary commensurate to experience and full medical benefits
• Strong vision and principles in action
• Strong professional development using professional inquiry and critical reflection
• Collaborative work with teachers, students, administration and parents
Interested candidates should send 1) letter of interest, 2) EVIDENCE OF CURRENT CA SINGLE SUBJECT TEACHING CREDENTIAL, and 3) resume with contact info. for three professional references, to the address below. Letters of recommendation are also welcome.
Teacher Search Committee ï‚® 2340 Jackson St. ï‚® San Francisco, CA 94115
(415) 749-2642 PH (415) 749-2647 FX ï‚® website: xcelacademysf.org
Blake Wigdahl
Program Coordinator
Exploratorium Teacher Institute
3601 Lyon Street
San Francisco, CA 94123
(415) 561-0313
----------------------------------------------------------------------
Subject: earthwatch opportunities
From: "Eric Friedman" <mcelover@yahoo.com>
Date: Tue, 3 May 2005 10:03:27 -0700 (PDT)
--0-1295917556-1115139807=:83010
Content-Type: text/plain; charset=us-ascii
hey all
earthwatch is offereing SF teachers a great chance this summer to get funded for an earthwatch expedition. they have money that they are begging to give away. they want to send YOU on a research expedition this summer.
i went to the bahamas 2 years ago to study coral reefs on a beautiful island. we spent every day snorkeling and recording data. i had such an amazing time . . . and it was all free!! paid for from a grant through earthwatch. if you have any desire, see the info below:
We need our past San Francisco area volunteers to spread the word -
quickly!
There is some funding available for SF Unified School District teachers
&
administrators who have never been out with Earthwatch to join an
expedition
this summer. Thanks to generous funds from the Jewett Foundation &
Oracle we
can help send teachers in to the field who will return & share their
experience with hundreds of other students. Please pass the word to
anyone
you may know who is interested. Anyone interested should contact the
Education Awards desk immediately: 800-776-0188 ext 118 or
mailto:EducationAwards@earthwatch.org
Thanks for your help in spreading the word!
__________________________________________________
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
http://mail.yahoo.com
--0-1295917556-1115139807=:83010
Content-Type: text/html; charset=us-ascii
<DIV>hey all</DIV>
<DIV> </DIV>
<DIV>earthwatch is offereing SF teachers a great chance this summer to get funded for an earthwatch expedition. they have money that they are begging to give away. they want to send YOU on a research expedition this summer.</DIV>
<DIV> </DIV>
<DIV>i went to the bahamas 2 years ago to study coral reefs on a beautiful island. we spent every day snorkeling and recording data. i had such an amazing time . . . and it was all free!! paid for from a grant through earthwatch. if you have any desire, see the info below:</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>We need our past San Francisco area volunteers to spread the word - <BR>quickly!<BR><BR>There is some funding available for SF Unified School District teachers <BR>&<BR>administrators who have never been out with Earthwatch to join an <BR>expedition<BR>this summer. Thanks to generous funds from the Jewett Foundation & <BR>Oracle we<BR>can help send teachers in to the field who will return & share their<BR>experience with hundreds of other students. Please pass the word to <BR>anyone<BR>you may know who is interested. Anyone interested should contact the<BR>Education Awards desk immediately: 800-776-0188 ext 118 or<BR>mailto:EducationAwards@earthwatch.org<BR><BR>Thanks for your help in spreading the word! </DIV>
<DIV> </DIV>
<DIV><BR> </DIV><p>__________________________________________________<br>Do You Yahoo!?<br>Tired of spam? Yahoo! Mail has the best spam protection around <br>http://mail.yahoo.com
--0-1295917556-1115139807=:83010--
----------------------------------------------------------------------
Subject: Learning Studio CLOSED May 4-6, part of Sat. 14th
From: "Exploratorium Learning Studio" <studio@exploratorium.edu>
Date: Tue, 3 May 2005 11:40:59 -0700 (PDT)
I'll be out the rest of this week, Wednesday through Friday -- no, not
to escape Free Wednesday, but for a birthday and to celebrate
completing the lengthy job of ordering new books for you for the
new fiscal year. We're getting some REALLY good stuff!
Also, on May 14th, last of the open Saturdays before summer institute,
Sandra will be closing early, about 1:00. Please plan accordingly.
As always, you can call 674-2875 to check for unexpected closures and
possibly save yourself a disappointment. If you're returning books when
the library is closed, they can be left at the front desk. Thanks!
Jo Falcon, MLIS
===============================================================
Exploratorium Learning Studio
3601 Lyon Street
San Francisco, CA 94123
(Phone) 415-561-0343
(Fax) 415-561-0370
(Email) studio@exploratorium.edu
(URL) http://www.exploratorium.edu/ls
===============================================================
----------------------------------------------------------------------
Subject: NOVA Evolution videos
From: <Btflaig@aol.com>
Date: Wed, 4 May 2005 00:28:38 EDT
Does anyone have a copy of the first two NOVA Evolution videos (2001). I'd
like to use them for a lesson next week. I live in Berkeley and I can pick
them up if you're not too far.
Thanks,
Bryan Flaig
Albany Middle School
----------------------------------------------------------------------
Subject: special relativity
From: "Paul Doherty" <pauld@exploratorium.edu>
Date: Tue, 3 May 2005 21:31:54 -0700
Hi Pinholers
Tom Humphrey and I will be doing an Exploratorium web page on Special
relativity.
What topics would you and your students like us to explore on the web
page, we can do animations, we can explore real data.
Did you know that experimenters measured the speed of light emitted by
pions that were traveling at 0.99975 c and found that the speed of
light in the forward and backward directions was c!
That in 1971 an atomic clock was flown around the earth twice once to
the east and then to the west and confirmed the predictions of time
dilation due to speed of the plane and gravitational time dilation due
to general relativity. It flew coach class on a commercial 707
airliner.
That GPS locations on the earth would drift off by 1.5 miles per day
due to time dilation due to the speed of the moving atomic clocks in
the GPS satellites orbiting the earth (There is an even larger term due
to general relativity the two terms together would produce a 7 mile
error or 35,000 nanosecond error every day.
We can use your questions to help us build a great site.
Paul D
----------------------------------------------------------------------
End of Pinhole Digest
---------------------------------------------------------------------------
To unsubscribe from pinhole, send an email to requests@exploratorium.edu
with the words 'unsubscribe pinhole' (without the quotes) in the SUBJECT of the email.
To subscribe to the digest and only get 1 combined message a day, send an
email to requests@exploratorium.edu with the words 'subscribe digest pinhole' (without the quotes) in the SUBJECT of the email.
Check out what your colleagues have written on Pinhole in the Pinhole archives at: http://saturn.exploratorium.edu/ti/alumni/pinhole.html
---------------------------------------------------------------------------
This archive was generated by hypermail 2.1.3 : Mon Aug 01 2005 - 16:06:48 PDT