Monday, May 17, 2010

Parallelepipeds!


We began our unit on 3D today with a review of vocabulary and a focus on prisms, learning how to calculate volume and surface area.  Do you remember the definition of parallelepiped?  Alysha H. does, as do her co-geometers Saeed L. and Valerie H.  Good work, guys - thinking about Geometry outside the box of the classroom!

I don't know why everyone was SO CHATTY today - it was like an epidemic.  Maybe someone can clue me in, but you know I am counting down until June 17- and I want EVERYONE  passing that exam!

Another note about HW #44 - some of the problems talk about triangular prisms, and we didn't practice solving any problems with prisms whose bases were not rectangles.  These problems may present a real challenge to you, but give them a try.  

JUST REMEMBER:
VOLUME of a PRISM  = AREA OF THE BASE x HEIGHT
SURFACE AREA of a PRISM = THE AREA OF ALL OF THE FACES ADDED TOGETHER

See you on the runway!






Friday, March 5, 2010

A Day of Finance

Today I had the pleasure of going on a field trip with 4 completely pleasant, open-minded girls, who were willing to go on an adventure, to look at something new without fear or hesitation, but rather with curiosity and a desire to expand their worlds.   We made it through the NY Fed's rigorous screening (!), received packets of shredded money, looked at pork bellies, soybeans and Bloomberg terminals, and took our photographs at the Bull at Bowling Green.    I am excited by the opportunity that they sought and embraced.  Who knew this field trip, reluctantly planned, would one of my best teaching days ever?  Thanks, girls!

Monday, March 1, 2010

Pi Day Digits

3.141592653589793238462643383279502884197169399375105820974944592307816406286

just a start!

World Maths Day

A great online contest that can connect you GLOBALLY and MATHEMATICALLY (What could be better?).  Check out this website:

http://www.worldmathsday.com/2010/

and let me know if you want to participate.  The way it works is this:

I sign you up so you can log on.  You are matched with someone else somewhere in the world for a one minute math contest. The math is pretty simple - adding, subtracting, multiplying and dividing positive and negative numbers.  You have one minute and you can see how well you are doing versus your competitor. 

Oh - and every contest you play will earn you 3 extra homework points.

What do you think?  Take the challenge!

Monday, December 7, 2009

Triangles are Forever!

I haven't posted to the blog in a while, but that is about to change.  Today we began the unit on triangle congruence, which is the underpinning of the rest of the course.  Nerd that I am, I had a great time proving beyond the shadow of a doubt that the measures of the angles of a triangle add up to 180˚.  Here is the solution to today's Challenger.    Can you come up with a check of the problem to make sure the answer I got was correct?  Tell me about it, and you shall be rewarded......

Check out my new Voki - and follow her instructions!




Tuesday, October 13, 2009

On Logic, the PSATs, and Opportunity


Today in Geometry, we delved into the study of Symbolic Logic and one of my inquiring students asked why we study Logic if we will never use it.  Using what teachers refer to as a 'Teachable Moment,' I spoke about a liberal arts education and the value of learning how to prove something to be true, step by step.  But I have been thinking further on this all day, and I want to add something to my argument.  First of all, we study Logic to develop what we call Habits of Mind.  I truly believe that it is always worthwhile to learn something that teaches us to discipline our thinking, and to impose some order on the chaos that is in our brains.  I have done this as an adult (and do so continually), and find the process both intellectually and personally rewarding - that moment when something becomes more clear because I have worked at it, and then I own it.  A small personal challenge met, a victory all my own.  And the more that I do this, the more I challenge myself and work at learning new things, or clearing up old misconceptions, the better I get at it, and the more I grow.  If you think learning stops once you graduate high school, or college, you are wrong - you can be a lifelong learner if you choose. 

Tomorrow morning the sophomores and juniors will take the PSATs.  Right now, I am sitting with my daughter who is a junior in high school, going over some practice questions, and she is stressing and complaining. "Why do I have to do this?  Why study?  Why cram?  What good will it do?  I'm stressed enough as it is."  I agree.  The night before the exam is not the time to prepare. You can prepare for tests like the PSAT and the SAT, but with time and effort, and you can improve your scores.  Are the tests stressful?  Definitely.  What do they mean about you as a person?  Probably not much.  BUT they can be the key to the opportunity, and for this reason, it is important to pay attention to them.

Everyone knows getting accepted to college is challenging and competitive.  And once you are accepted, going to college is expensive, even if you go to a public institution like SUNY or CUNY.    ANYTHING you can do to improve your application or resume, or make yourself look just a little better might be the thing that earns you notice, admission to the school of your dreams, acceptance to a travel program or internship, or scholarship money.  So while college may seem very far away, and the PSAT may not seem to be important, remember that we don't always know how significant something is until after it is over.  Another reason to do the best you can do, as often as you can do it.

So get a good night's sleep (no chatting/Facebooking/texting until 2 am!), eat a good breakfast, and don't forget your pencils tomorrow.

One last thing:  you are not a test score.  This may seem to contradict everything I just said, but realizing that your exam scores are but one facet of the total package that is YOU may put things perspective.  So try your best, but remember there is A LOT more to you than a number.  I know that, and I hope you do too.  


Good luck, Geometers and Living Mathematicians!