Document the Positive #3

Another thing that I did well this year, was getting guesses before we delve into the problem, or find a solution.

Asking students to put down a guess did a whole lot of things, all informative and only some really helpful.

1)  It revealed to me that they had never considered using their own experience to determine if an answer is reasonable.  I spend a substantial part of the year trying to divorce them from the idea that the teacher has a magical ability to know the answer.  At first I would just walk through their math and reasoning.  Over the last month, I’ve started thinking out loud some estimation calculations (things like g = 10 m/s/s, round everything off to 1 sig fig, do the mental math out loud)

2)  I found that they had never gone through the thought process of determining a range of reasonable answers.  Even the Hi/Low was a real struggle at first.  I have to think this one through a bit more, because I pretty much limited myself to talking about more/less than 0 most of the time.

3)  One thing I should have done, is to create a page in their notebooks of useful quick and dirty conversions.  Things like 60 mph ~ 30 m/s.  You can roughly double any speed in m/s to get mph.  10 Km  = 6 miles.  2.2 lbs = 1 kg, but also .5 kg ~ 1 lb.  I think those might have helped.

4)  At the very least, by forcing a guess I was able to find out if anyone in the class had a logical thought process.  I could toss out a ridiculous number and the students would all guess around my number.  I did this with estimating how far up a ramp a cart would roll during a gravitational potential energy / kinetic energy demonstration.  All of the guesses in the first situation scattered around my ridiculous guess.  In the second situation they jumped all over the map (at least they didn’t trust me anymore).  In the third and last situation, they did the calculations, and adjusted for friction.  Just by their guesses I could assess how much they understood about that situation.

5)  The last part is that forcing a guess (along with a diagram) forced them to think about a physical situation – or at least read the problem – before jumping off into math world.  Also, having that guess to check against caused more students to bring back that answer from “math world” and see if it actually fit before moving forward.

Document the Positive #2

I made a promise to myself that I would document positive things this entire week.  Today I’m going to focus on experimental method.

At the beginning of the year, I changed my approach to uncertainty and measurement.  I just wish that I had continued the push well into the year.

In the past, I’ve done this great lab on measurement that I got from my cooperating teacher during my student teaching.  The students are asked to measure the length and width of a lab table using only a piece of string.  The point is that their measurement has a large uncertainty due to the quality of their tools.  Then they calculate area to see how uncertainty in measurements propagates.

In previous years, this quickly turned into the rules for significant figures.  During the lab, I made them keep writing all measurements as:

3.4 +/- 0.1 strings

But in honors physics I jumped to just using significant figures too quickly.  I assumed that my honors students were higher skilled than my general physics students (whoops!).

The major benefit was that uncertainty in measurements wasn’t just “our result is wrong” or the useless “human error.”   We changed our language so that uncertainty was in “human hands using a cell phone timer” or “normal eyesight and a meterstick.”   Therefore, it was easier (although still difficult) for students to see slightly different numerical results as equivalent.

So what I’d like to do next year – to push the uncertainty of measurements throughout the year, is to require the plus/minus on every lab.

I’m also thinking it would be nice to have a measurement problem on quizzes/tests.  Something where I’ve taken measurements, and the students need to apply their calculations and provide a prediction along with uncertainty.  Well, maybe that might be a bit much.

Right, so that’s something I’m proud of.  It set me a solid week behind the other physics teachers, starting a slow drift resulting in my being 1-2 units behind the other teachers at the end of 3rd quarter.  I think the ability to compare real measurements is worth the time.

Document the Positive

I’m approaching the end of the school year and I’ve been pretty negative almost the entire time.  Because I don’t know where I’m teaching next year (due to my spouse’s career), there are a lot of changes that I didn’t make based on my perception of investment/return.  Those problems have occupied my mind, pushing out the problems that I have solved and addressed.  So I’m going to spend this week documenting one thing per day on this blog that I changed this year for the positive.

Today I’m going to talk about less structured problem solving.

In the math & physics blog-o-twittersphere there is a strong discussion about how to make our students better at applying this wonderful math that they’ve spent so long learning.  I’ve even noticed this in my own teaching, how a slightly novel situation throws my students for a complete loop.  If the information in a problem was not explicitly listed, they weren’t sure where to start.

In the past week, I’ve noticed that this is no longer the case.  I can’t take all of the credit, but it seems reasonable that certain teacher moves contributed to their increased flexibility.

1.  From the beginning of the year, I refused to nail down a particular explanation or calculation as correct.  It was always:  “What assumptions are you making?”  “What Jane said seems to be assuming X, is that a valid assumption?”  “I can’t say if that’s correct, but I can listen to your thought process and tell you if something doesn’t match up.”  I also tried to remove myself as the expert with all the answers, going so far as to not even know the final calculation so I couldn’t react with body language.

2.  Presenting situations first with a bare minimum of information.  And by bare minimum, I mean just enough to understand the physical situation, but not enough to make all of the calculations.  Students are then prompted to ask for the information they need.  I could always add in more prompting or help in figuring out what information they need later.

3.  Presenting situations with an excess of information that is unnecessary.  This was really eye-opening for students when they were doing gravitation problems where I would give them planetary radii and orbital radii and they had to figure out which radius/distance to use.

4.  Forcing them to draw diagrams and list variables.  I taught them to do this from the beginning, but many students refused.  “Drawing a diagram is too much work!”  They were very focused on the step immediately in front of them.  I -think- many of them weren’t thinking 2-3 steps ahead in a path to solutions.  Once I forced the issue and refused to grade their work unless they drew a diagram (I offered to help them figure out a diagram if they didn’t know what to draw), the quality of work and accuracy improved drastically.

DISCLAIMER:  I’m not saying I came up with any of this, or that anything is groundbreaking.  I just wanted to make sure I have a record of things that I’m doing that seem to be working well.

Thoughts

I live in a state (one of the few) that hasn’t adopted the Common Core State Standards (CCSS). I’m at a school that was labeled PLA (persistently low achieving) based largely off one year of data. A lot of people are surprised by the label. I came in for just this year, and I’m not surprised. There are plenty of very high achieving kids taking Calc BC, along with seniors who are still trying to pass Algebra 1.

I bring this up because a few things really clicked for me today. First off, I’ve been thinking more about reasoning courtesy of Jason Buell,  Shawn Cornally, and Dan Meyer’s (seriously no-one reading this needs Dan’s link) explanations the Ladder of Abstraction.   And David Cox is talking about how they’re spending good solid time figuring out how to align with the CCSS .

It’s all clicking together, how much this stuff ties together, and how I want to push my students to keep re-using things they’ve learned to explore new ideas.  I’m trying this a bit in my current physics class, but there is SO MUCH MORE I could do.

But testing season (why the FRACK do we have a “testing season” that takes MARCH, APRIL, MAY and JUNE???) is beginning, and there is no support for anything radical that I’d like to do unless it means more students getting As (from parents) or huge improvements in test scores.  Otherwise, as a physics teacher, I am basically ignored.

I’m going to be at another school next year.  I just hope I end up in a place that has adopted the CCSS.  At least then reasoning and abstraction will be a required part of the curriculum.

 

p.s.  that’s a bit rant-y.  I should put up something positive that has happened in my classroom.  Perhaps that will be my goal for this week.

A Sophie Germain moment

I’ve been wallowing and angry and bitter at everyone around me for the past week or two.  I was all about blaming the students for their lack of reading skills, the school for not preparing them, their parents for being so passive-aggressive and short-sighted.

Yesterday I had what I’m going to call my @sophgermain moment.  I can’t change most of that, but I can change what I’m doing in the classroom.  I have control over what I’m doing, and I’m not making changes that help my students.  I still think some of them are acting like rotten people right now, but I’m going to check myself every morning and afternoon:  Is what I’m doing helping students?

If not, I’m going to shut my mouth and do something useful.

(side note:  I can’t stop complaining completely, but I’ve let myself get out of hand)

School Culture

I’m two weeks from the end of the first quarter.  I think this is enough time that I have  a better idea of my new school’s culture.

First off, although every student is required to do science fair, I’ve learned that no one takes this seriously.  Even the child of a school board member – that school board that mandated the science fair – doesn’t want to take part.  So I’ve got students that don’t want to do these projects, teachers that don’t want to help them, administrators that don’t want to hear from either party and parents that think it’s too much.  And yet the show goes on!

If I was to sum up the school culture here, I would say it’s all about the grades.  Most of my honors students didn’t read a short 3 page essay on Grit.  When I asked why, they couldn’t give a reason.  Many confessed that they treated the survey on the back like a lottery ticket – randomly filling in answers.  In their words, if it isn’t graded, then it can’t be important.  On top of that, the system has worked quite well for my honors physics students.  Classes have typically been easy and grades have been inflated from the possibility of parent intervention.  Sometimes the parents actually intervene so their student doesn’t have to face the prospect of not getting an A.  One of my honors students told me her mother said if she didn’t understand a class, she should transfer out.  It wasn’t get extra help, or figure out what she was missing.  Nope, if it’s too hard then just keep doing something easy.  All in hopes of the perfect GPA!

On the other hand, my general physics students are eager to learn, but they don’t have the tools.  I’m seeing a fair number of students that clearly have never been required to stop and think about why they were doing something.  At least with my general physics students, they’ve actually failed before, so they’re interested in trying something different to see if things go better.

Bear with me a moment, because I’m about to get nostalgic.

At my previous school, we had developed a very different school culture.  From the student’s own mouths, we had created a culture of learning.  Student’s were very invested in if they learned the concepts, knowing the grades would follow.  I miss that.  There were other problems – big problems imposed on us from the outside.  But at least we created an awesome school culture.

Love/Hate Science Fair

More on science fair?  I know.

Hate:  They have to fill out like a million forms, and get them in super early.  I had to take 30 minutes out of every class today to show them explicitly where the forms are, and which to fill out.

Love:  Student submits lame idea from a website on the Stroop Effect.  I turn it around on student, and make it a really involved experiment.  Student confesses they don’t care at all, they just want to get it over with.  Student and I discuss what is interesting, and stumble upon how to people come up with ideas.  I suggest my theory that people just take existing knowledge and assemble in interesting ways.  Student – out of the blue – suggests they give people a set of objects, and see if people end up building the same thing.  BRILLIANT!  I’m so in glow of this idea, and so is student.

The calculation is fuzzy, but if these projects actually happen, the forms may be worth the work.