Let's Play Spot the Error (Misconception)

A few months ago a bunch of Sports posters showed up in the hallways. Okay, great. Have the kids do some research into different sports as part of their PE curriculum. I think they might get more out of playing a sport, but hey what do I know? I think reading physics books is fun.

On closer inspection I saw that each of the sports was being related to Newton's Laws. As I read the posters it was clear students had simply found the law(s) on Wikipedia or some other site and then did their best to apply them. Sometimes the results were the "t-shirt versions" of the laws, i.e. short, simple and catchy, but incomplete. Such as:

Or:

But, mostly it was the application of the law that was wrong - no surprise there.

I don't share these to make fun of the students, they were doing their best, or to embarrass the teachers, they probably don't know any better. I shared these because the photos gave me an idea for a new game - "Spot the Error."

Lets hit misconceptions head-on. Not in the contrived language from a teacher, but in the language of peers (albeit younger peers). I would love to have a collection of student quotes on a full range of physics topics... I can see these as material for test questions, homework, or class discussions.

As a side note the quality of student work that is posted in public spaces is a big topic of discussion at our school.

Frozen Water "Sine Wave"

Some more video awesomeness.

I'm not sure I would call that a "sine" wave as Boing Boing did... but all the same some pretty cool visuals and some great potential links to physics and math. I'm teaching trig to my SL kids at the moment, might make for an interesting diversion. There is no place in the SL curriculum that hints that parameters such as amplitude and period can be functions rather than just constants... 

More Reflections - The IB and other Things

Moving back to greener pastures.

Next year I'm returning to my previous school. Leaving an overseas post, a great pay check and a school that I perceive to be in a pretty deep rut.

[Insert self-pitying rant on the failures of my current school].

This is my third school... I'm burned out. Tired. Frustrated. And still loving it when the light goes on and my kids get a tough concept.

IB it's not you. It's me?

With a senior class who doesn't have a single IB student likely to score above the world average and 25% of whom are likely to fail the diploma...  reflection comes quick and often. 

Looking over past posts as reminders of what went well (or not so well) I came across this at the bottom of a post about the unit circle.

Reflections: To be honest I don't know where the stage for this success was first set [...]. While having all the mathematical tools needed [...] is necessary I don't think it's sufficient. Two more pieces were needed:

1. Students feeling the freedom to tackle a problem with different methods, thus allowing them to see problems in the context that is most natural to them. 

1. Students being trained to solve new tough problems not simply repeating steps that the teacher has demonstrated on a whiteboard. 

A year after teaching that lesson on the Unit Circle I still believe those two pieces were the key to one of my most successful class periods in 10 years of teaching (and most other successes I've had).

Those two pieces seem to be in stark contrast to the demands of the IB and  other standardized test based programs.

Mechanical Integration - Surface Area

A clip from Dirty Jobs (one of my favorites) of a machine that calculates the surface area of irregularly shaped objects - in this case tanned hides. Too clever. Wish I'd seen this when I was teaching integration.

Spotted originally on Boing Boing.

IB Math SL and UbD

Could your students solve (with understanding) the following problem in 6 minutes with only 2-3 hours of class time and no prior exposure to binomial expansions or pascal's triangle?

Sure, my kids can write down the correct answer - they might even understand what they're doing - but it took a whole lot more than 2-3 hours to get them there.

I came to my current school a believer that the IBDP program was a good, even great, program for many students. I will be leaving with some serious doubts... In physics there are 6 hours set aside for kinematics but 18 for climate change and energy sources. Seriously? In Math SL I have 9 hours total for arithmetic/geometric sequences and series, binomial expansion plus rules of exponents and logarithms. Where's the time to develop either the need for these tools or any real understanding?

If you say it's supposed to happen in a prior class, then why isn't it in the presumed knowledge?

Today is a PD day. My job was to write enduring understandings (a la UbD) for my Math SL classes. So what is the "enduring understanding" of 2-3 hours spent on binomial expansion? Or for Math SL in general?

If I'm honest?

Students will understand that a big scary test that determines their college options is coming their way so regardless of personal interest they will pretend that they want to be engineers and "learn" math.

Or when thinking about arithmetic and geometric series: 

Students will understand that these questions are easy points on the IB test and should not be missed and that missing these questions will be followed by a long frustrated rant from the teacher or appropriate administrator.

For the sake of transparency maybe I should put this on my wall?

Please tell me I'm wrong. I know people live, breath and bleed the IBDP. It's just that I'm losing my faith. 

Independent Project Elective

This year I've been running an independent project class. Some of the kids are doing really cool things. Pin-hole camera, wind-powered generator, app development... Others are struggling with the lack of structure and the realization that when projects are not handed to you by a teacher they're hard! A few groups are a bit slippery about how much they are really getting done... Still not sure how to handle that when every project is different.

Anyways. The real reason for the this post is to beg and plead for folks to give my students real feedback that comes from someone besides their teacher! Each week (supposedly) students are creating a short blog post describing their work, any struggles and what the plan is for the next week. I decided early on that the blogs should be the student's space, while required, the posts don't need to get marked up in red ink so to speak by their teacher...

If you've got 5-10 minutes to browse the RSS feed it would be much appreciated.

RSS Feed

Did You Hear What I Heard? - Value of Lectures

The other morning on my way to make a few copies I saw a fellow teacher confronting a couple students over what appeared to be copying of homework - a practice that admittedly is pretty rampant at our school. I stood trapped at the copier, knowing what was coming my way - a one-sided conversation about the wrongs of copying. I braced myself and prepared my smiling and nodding muscles.

The monologue covered the predictable ground that copying work is not only wrong but results in little or no learning. I was smiling and nodding in agreement, but not feeling the passion of my colleague. Then came the unforeseen twist. This teacher goes on to explain that they intentionally change the style of bullet points used during lectures and then at the end of the lecture asks the students flip through their notes to see that they blindly copied the variety of bullet points... Using this as a jumping off point to explain that copying doesn't equate to learning. At this point in the conversation I tried to keep a straight face and not laugh at the irony.

This teacher had just equated the educational value of taking notes during their lectures with copying homework!

I couldn't agree more.