/sci/ - Science & Math

>>9278174
So, what did you say? Did you explain how it works to her, or did you make this thread to admit that you don't know either?

>>9278174
>Girl raises her hand during the lesson
>"I don't understand how letters can be numbers. In my head they're like two different things"

"And that's why you're going to be a pole dancer when you grow up. Now shut up skank, men and decent women are trying to learn."

>Get given a paper of double angle formulas and be told to just teach this today for the regular teacher

1 Use rotation matrices to derive angle addition formulas
2 Let x=y
Q.E.D.

>>9278174
Get better at teaching?

You're a grown man posting an upset picture with a gun and the caption "Kill me." because a school girl hasn't been introduced to algebra/notation?

People must hate you. Sorry, but how is this a thread? Why do you care. You're the teacher, WHY WON'T YOU EXPLAIN IT TO HER? /sci/ was always bad but I swear to God 2017 /sci/ is something else.

>>9278205
Did he say that he didn't explain it to her?

>>9278206
He never mentioned it, I assume he didn't and even if he did this thread is still fucking crazy.

>>9278205
I know right? /sci/ is now easily the worst worksafe board on 4chan. Easily.

>>9278207
What do you think he did? Just stood there and stared at her?

>>9278211
He probably taught it terribly.

>>9278174
> high school student
> doesn't even understand algebra
how tf did she graduate from middle school?

so how did she get that far along to be in a lesson with double angle formulas and not encounter a variable yet? fake and gay

Just say it’s like a label or some shit. “A price tag is assigning a value to the article of clothing.” Then abstract and generalize. I don’t know how people have trouble with variables but being an autist about it just fuels peoples avoidance of math

>>9278174
>good question suzy, let's pretend there are ten apples in total and you want to split the apples between you and your friend such that you have 4 more apples than your friend.
>now, without thinking, do you know how many apples you and your friend will have?
>probably not, but let's try and figure it out. Since we don't know how many apples you both will have let's say your friend will have have "x" apples; don't worry that "x" is a letter and not a number. Just think of "x" as a placeholder for a number you don't know.
>now if you want 4 more apples than your friend and your friend has "x" apples, how many apples will you have? you'll have "x" + 4 apples.
>now, since you want to split 10 apples between you and your friend and your friend has "x" apples and you have "x" + 4 apples, that means that "x" (apples for your friend) + "x" + 4 (apples for you) = 10.
>doing some algebra, we see "x" = 3. since "x" was placeholder number for the number of apples your friend will have, your friend will have 3 apples and you will have 3+4=7 apples.
was that so hard? now stop berating high schoolers on a mongolian knitting exchange forum and do your job.

>>9278194

I'm not convinced that rotation matrices are an appropriate and understandable way to derive trig formulas to precalc students who know squat about linear algebra.

>>9278251

Yeah rotation matrices are for chumps. At least teach them about quaternions and abstract algebra

Please don't bully the prestigious, intellectual substitute teacher.

>>9278174
You are a math sub teacher. That's pretty depressing.

>>9278209
Bruh, I didn't say that, I'm just saying I used to come here from a couple years back, I probably wouldn't have seen a thread this bad. Not impossible, but I probably wouldn't have. I haven't checked how much worse the other boards may or may not have gotten.

To be fair guys, I think OP wants to kill himself because he is a fucking high school teacher.

>>9278209
you should see neo-/g/

>>9278251
They'll understand matrix multiplication weirdness and learn how to derive trig identities at the same time.

>>9278194
Very autistic post

>>9278774
I am not sure what makes me sadder, that there are actual people like that or that there are people who find that funny

>>9278788
People are cruel and heartless, people with true humanity are hard to come by nowadays. If you're directing this at me and assuming I'm laughing at autists, well really I was just pointing out that anyone who alludes to a student becoming a whore because she doesn't understand variables probably has something wrong with them. The lack of empathy combined with wanting to use an unnecessarily complex teaching method for high school students makes me assume autism. Sure that girl probably isn't the sharpest knife in the drawer but shutting her out of the enlightenment of education is a surefire way to steer her towards the wrong path in life.

This brings up another tragedy of modern society: that the people who hold our childrens' minds in their hands are so poorly motivated and compensated.

>>9278773
But quaternions are conceptually easier and also easier to calculate

>>9278246
Why do brainlets always explain mathematical concepts in terms of apples? Would you also explain category theory by introducing category of apples? Then what are the morphisms? What about products and coproducts?

>>9278804
noo I meant the post you linked
I am willing to give autists a pass but there are nonautists like that too

>>9278174
just use a container analogy or something, it's not hard to grasp. she shouldn't be thinking in numerals and letters anyway, those aren't the actual concepts.

>>9278174
That's prety normal, m8. Not all people get all abstrations at first. At 13 I simply couldn't understand what "solving for 'x'" meant. I also remember reading about some guy who couldn't grasp something really basic about geometry when he was a kid, but after IQ testing he turned out to be a genius. He only had some block with that specific subject.

>>9278174
This is why programming should be taught from a young age

>>9278807
are you retarded?
>he explained what a variable was to a highschooler using apples
>that means he explains everything with apples
its_time_to_stop_posting.jpeg

>>9278174
Teach them the trick [math] e^{i(a+b)} = e^{ia} e^{ib} [/math] so that they can remember the formulas.

>>9278807
>thinks that you're a brainlet if you explain a concept in a colloquial enough way that even the chaddest of Chad, wooiest of woo-girl, and (you)iest of autist can grasp it
>thinks that you're a brainlet for explaining things so that everyone can understand it to some degree
Holy shit.

>not taking the opportunity to teach them rational trigonometry

>>9278884
I don't mean explaining things in simple terms, but why always everyone explain everything in terms of apples and not anything else? Why apples? How can a letter be a number? Say you have this and this many apples..., What are trig functions? Let's consider an unit apple centered in the origin...
For fuck's sake, there are so many things you can use to colloquially explain something, why everyone chooses apples?

>>9278887
Yeah that will surely be helpful

>>9278220
Former mathlet here, i went through all of middle school, and most of high school not understanding algebra, mostly because i didnt give a shit, and my teacher's (along with the rest of my fucking class) did nothing but mock me. No one wanted to fucking teach me anything, and i was mocked ceaselessly. Dropped out of college, and started learning more advanced math and science, on my own accord, because i felt like trash, and while im certainly no mathematician, im much better at math then I was, which is nice.

>>9278936
Chill out sperg

>>9278174
What's it like being a high school math teacher? I'll be getting my bachelor in math in a year and I'm seriously considering doing that stuff for next year so I can buy my very own Land Rover Defender.

>All this salt
If you don't understand basic algebra by highschool there's something wrong with the system and it's really easy to get pissed. Imagine you are told you need to teach calculus to some poor highschooler who doesn't understand functions and doesn't know how to manipulate algebraic symbols. Theb it's your fault for not teaching shit you should be required to know? Fuck thay, I've seriously tried with many students but in the end they don't know shit.

>>9278810
>noo I meant the post you linked
Ah yeah, just one more variety of people that make the world unpleasant
>there are nonautists like that too
Yup, but they're probably psychopaths or have some other mental problem that strips them of their ability to empathize and communicate sincerely