Sunday, January 22, 2017

Studying for Exams

A student (not a current student) just emailed me for advice to give other students in studying for the midyear exams.  Here's what I wrote back:
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Your instincts sound good to me except for the bombarding your teacher part!!!
I would add to your list that the review time is a good time to review certain concepts or procedures that weren't quite clear the first time because, oftentimes, it is the second time through that things start to make more sense and come together.  
Also, a skill that students must have on a midyear or final that they don't really have to have on a unit test is to think about which area of focus the question is about (kinematics?  forces?  energy? etc.) so that can trigger the proper problem solving procedure in their mind.
An often overlooked thing is to look at is to allow equations to guide your thinking on conceptual questions.  Oftentimes students will get these wrong because they are answering the questions conversationally ("oooh - 'b' sounds right") when they should be thinking constructively ("If v is constant, then net force must be zero so...")

Here are some of my notes from the book "How We Learn...." by Benedict Carey

-The Fluency Illusion ("But I studied so hard for that test and knew everything!"): If you do a lot of classic review: reread, highlight, quick recitation of basic facts in one big sitting, then you are likely to feel prepared when you are not. This kind of one-shot, passive review is not the best way to get stuff into your noggin. (although the cram session the night before does help in the short term with recall related items, it does not help with problem solving & understanding).
-Mix it up: Do not study in an extended, focused way in a quiet environment. Rather, break your study sessions into shorter sessions extended over several days and do them in different environments with different types of distractors. The more different types of contexts and the more times you've had to retrieve and use a memory, the easier it is to access later.
-Sleep is important: Early, deep sleep stages seem to be most helpful in laying down fact-related memory. Late stage sleep stages seem most useful in creativity, impasse-breaking issues. 
-Interleaving material and pretesting seem to be most efficient at getting the memories being laid down to be easily retrievable (the best way to increase recall is to retrieve the memory many times). Even physically skilled practice should be broken up so you are not just concentrating on one one skill at a time. Interestingly, focused practice or study feels most effective and gives greater apparent short term gain, but performance testing shows that interleaving works better (Interleaving is more like the real thing the author suggests). Likewise, taking tests (even without any background knowledge) and getting immediate feedback is the quickest, surest route to learn new facts.
-Start early and take many breaks. The brain continues to work on stuff off-line and ideas/connections percolate up from your subconscious during the off times. 


-Rideout

P.S. They are not "poor students who are going through the excruciating pain" but rather lucky individuals who have been granted an opportunity to assimilate the best tools for thinking yet invented by mankind (AKA Physics) into their own world-view gestalt and then to practice these skills in a reinforcing way.  Once they cease to be students (in the larger sense of the word) that's when their real existential pain will begin!  Cumulative exams ground us and give us intellectual purpose like few other activities in life.

Sign of Truth

Irene shared this one with me (one of the many great signs from the recent marches):


Thank you, young man - I do feel little better now!

Wednesday, December 7, 2016

The show must go on...

Today I referred to my class as the "audience".  I made a lame joke and then said "tough crowd".  Later I said "I'm feeling under-appreciated by the audience today".  Then, as they were almost allowing themselves to be amused, I said "It's so much better for my self esteem to tell myself in the morning to get ready for the show rather than to say 'Oh, yeah - I'm a high school teacher'.


Monday, December 5, 2016

Tuesday, November 1, 2016

Falling into Winter

Out for a walk with my kids, enjoying the fall colors. 
This year those fall changes cause me to reflect on my own ‘fall’: worsening eyesight, a pudgy middle section, and ever whitening, slowly thinning hair. 

My kids are still young enough to enjoy all the seasons.  But the fall means winter soon and winter is only enjoyable if there is a spring at the end of it, right? 

What if there’s no spring coming – won’t winter be sad and depressing?  I check with my kids “Would you still love winter if you didn’t have spring to look forward to?”  They look perplexed and say “Won’t we still have family game night huddled around the wood stove and dig out the driveway together and have family snowball fights?”


The wisdom of youth! Relieved, I go back to enjoying the fall colors.

Thursday, August 18, 2016

The Message or the Messenger?

Everyone knows the sound of a violin is not the actual violin itself, right? I'm not so sure...

"North is that way"
"That car is red"
"This object is cold"

All of these statements are examples of us projecting an input into our senses as being a property of the object out there.  In essence, we humans seem to confuse the message with the messenger all the time.

The north pole of the compass in my hand points a certain direction, so I call that direction north, but really it is a magnetic south pole 'up' there somewhere that is attracting my magnet. So is North 'up there' in the direction your compass points?

Most objects (ones that are not glowing) are not a "color" - they re-emit certain colors being thrown at them and absorb others.  The ones that are re-emitted are what we see.  Look at a red car under a green light or in the nighttime and it will not be red.  So is it red?

An object feels cold because you are transferring heat to it.  If you had a lower temperature, it would feel hot to you!  So is it the object by itself that is cold?

If we do this all the time, what about when we see someone doing something bad?  Is that a bad person?

A person engaged in an act of kindness must be a kind person, right?

Someone acting in a warm way towards me must actually like me, right?

I should connect those happy feelings from advertisements to the product on the screen, right?

Wait a sec, I think I hear a violin...

Wednesday, July 20, 2016

How to know you are doing a beach vacation right

If you are leaving the beach in the morning when everyone else is arriving and then returning in the afternoon when they are leaving - then, you are doing it right!