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Show HN: I made a cheap alternative to college-level math & physics tutoring

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Re: Show HN: I made a cheap alternative to college-level math & physics tutoring

#191
post #184

Earlier quoted context omitted.

>Of course it's wrong, on Mars the sun is blue I’m not an Astrophysicist but already this seems like shaky ground. Apparently at certain times like during sunsets the sun can appear blue on Mars, but it’s not generally true like your comment suggests. Moreover if you ask GPT4 about sunsets on Mars it knows they can look blue. I’m not sure I can conclude much from the examples given.

You don't have to be an Astrophysicist. We have color photographs. Nothing in anyone's model of how things work can refute direct evidence, if evidence and the understanding of the world collide, it is the understanding that gets altered to fit the evidence. And I'm not astrophysicist either, I'm just playing with a stacked deck, because I have trained my new feed to give me quirky (if not mostly useless) neat bits o…

> the common man isn't testing ChatGPT for quality

Neural networks are a connectionist approach to cognition that is roughly similar to how our brains operate. Humans make mistakes. We're not perfect. We ask someone for advice and they may confabulate some things, but get the gist of it right. A senior developer will write some code, try it out, find a bug, fix it, try it again, etc. We don't develop a fully working operating system kernel on our first attempt.

Chain of thought prompting increases LLM output accuracy significantly as that is how you get an LLM to "think" about its output, check its output for errors, or backtrack and try another strategy. With the current one-token-at-a-time approach it can only "think" when generating each token.

Next generation models could integrate this iterative and branching cognitive process in the algorithm.

> After the hype dies down a bit, we'll likely have a better understanding of what advances in this field we really have.

LLMs can already do many natural language processing tasks more accurately and competently than the vast majority of humans. Transformers were originally designed for translation. (GPT is a transformer that knows many languages.)

BTW I tried the blue sun question with Chat GPT 3.5 and it easily figured out the Mars solution after I suggested that I may not be standing on Earth.

"Several celestial bodies outside of Earth could potentially exhibit conditions where the Sun might appear blue or have a bluish hue. Here are a few examples:

Mars: Mars has a thin atmosphere composed mostly of carbon dioxide, with traces of other gases. While the Martian atmosphere is not as dense as Earth's, it can still scatter sunlight, and under certain conditions, it might give the Sun a slightly bluish appearance, especially during sunrise or sunset.

Titan (Moon of Saturn): Titan has a thick atmosphere primarily composed of nitrogen, with traces of methane and other hydrocarbons. Although Titan's atmosphere is much denser than Earth's, its composition and haze layers could potentially scatter light in a way that gives the Sun a bluish hue, particularly when viewed from the surface.

..."

Re: Show HN: I made a cheap alternative to college-level math & physics tutoring

#192
post #184

Earlier quoted context omitted.

>Of course it's wrong, on Mars the sun is blue I’m not an Astrophysicist but already this seems like shaky ground. Apparently at certain times like during sunsets the sun can appear blue on Mars, but it’s not generally true like your comment suggests. Moreover if you ask GPT4 about sunsets on Mars it knows they can look blue. I’m not sure I can conclude much from the examples given.

You don't have to be an Astrophysicist. We have color photographs. Nothing in anyone's model of how things work can refute direct evidence, if evidence and the understanding of the world collide, it is the understanding that gets altered to fit the evidence. And I'm not astrophysicist either, I'm just playing with a stacked deck, because I have trained my new feed to give me quirky (if not mostly useless) neat bits o…

[deleted]

Re: Show HN: I made a cheap alternative to college-level math & physics tutoring

#193
post #184

Earlier quoted context omitted.

>Of course it's wrong, on Mars the sun is blue I’m not an Astrophysicist but already this seems like shaky ground. Apparently at certain times like during sunsets the sun can appear blue on Mars, but it’s not generally true like your comment suggests. Moreover if you ask GPT4 about sunsets on Mars it knows they can look blue. I’m not sure I can conclude much from the examples given.

You don't have to be an Astrophysicist. We have color photographs. Nothing in anyone's model of how things work can refute direct evidence, if evidence and the understanding of the world collide, it is the understanding that gets altered to fit the evidence. And I'm not astrophysicist either, I'm just playing with a stacked deck, because I have trained my new feed to give me quirky (if not mostly useless) neat bits o…

Another thing to note is ChatGPT is configured to respond concisely to reduce cost (every token costs money). This reduces its cognitive ability.

You literally have to tell it to think about what it is saying and to think of all of the possibilities iteratively. That is chain of thought prompting.

GPT-3.5 figures out the correct solution on first response:

"I am standing outside and observing the sun directly without goggles or filtering of any kind. The sun appears to be a shade of blue.

Where could I be standing? Think through all of the possibilities. After stating a list of possibilities, examine your response, and think of additional possibilities that are less realistic, more speculative, but scientifically plausible."

Re: Show HN: I made a cheap alternative to college-level math & physics tutoring

#194

Earlier quoted context omitted.

Ah I see why you'd want realtime interaction. In earlier versions there used to be voice chat, so when the learner-and-teacher happen to both be free, you'd talk in real-time. It was removed to focus on the async video aspect, but hearing what you said puts that back in my radar... When you mention "good prompts", is that in the context of AI, or with asking questions in general? Is it easy/hard to create good prompt…

Appreciate you following up! I plan to sign up over the weekend which is normally when I do my longer blocks of studying and have more questions. I think that what I mean is that sometimes if I ask for an explanation about a topic or question, I don't get the magical answer that answers my question after my initial prompt. That is to say, I typically need to ask 5-6 clarifying questions to an LLM to get the explanati…

Ah, so since you usually need to ask 5-6 clarifying questions, you'd rather it be done in short bursts synchronously!

Right now with explanations.app, you can only follow-up with comments OR by posting new questions - asynchronously. I see that this might be a problem.

I look forward to you trying it this weekend :^) so I can also hear about your usage experience before deciding on the best way to solve this sync./async. trade-off

(perhaps the naive solution is voice chat - you post a question, your teacher happens to be free, you happen to be free, you just talk quickly back & forth)

Re: Show HN: I made a cheap alternative to college-level math & physics tutoring

#195

in nature it is the restriction that affords growth. Not growth itself. Growth is like cancer. Restriction is like selection. Upvoting alone also doesnt outline content that is toxic, incorrect and makes it harder to find content that we are interested in. Afterall, you have a title that explains if the content is of our own intrest fairly well.. the upvote is a popularity contest. Downvoteing alone allows our own al…

>I wish It didn't happen here Sorry I don't quite understand - would you be willing to elaborate?

Re: Show HN: I made a cheap alternative to college-level math & physics tutoring

#197
Attendance is correlated with student success. This leads to mandates to increase attendance. Then the perverse incentives kick in. Teachers refuse to post good materials online so more students have to attend.

The idiots in the US Department of Education decided that correspondence courses were not worth as much as distance learning courses. They decided the difference between correspondence courses and distance learning courses was that in distance learning courses the instructor initiated (real-time) regular and substantive interaction with the students. This means that if your students can take the class entirely online and never have questions because of the excellent materials, then your school gets penalized by getting almost no money for online courses. If you sabotage your online materials so badly that students have to sit through painful, multi-hour video chats with annoying instructors, then your school get the big bucks.

The US Department of Education has destroyed online education through gross incompetence and blind rule following.

Re: Show HN: I made a cheap alternative to college-level math & physics tutoring

#198

> Help resources become inefficient - because so much material is restricted, and so much time is spent on delivering live lectures, there’d often be 40 students competing for help from 2 TAs in a 2-hour Office Hours I had the exact opposite problem when I was both a TA and later a professor. I would beg and plead for my students to come to office hours. "It's free one on one tutoring from the guy who writes the test…

> I would beg and plead for my students to come to office hours. "It's free one on one tutoring from the guy who writes the test! It doesn't get any better than that! If these times don't work for you, I can accommodate your schedule!" And yet very few people would come. And then I'd get feedback at the end of the semester that I "was never available to help."

You need to constantly remind your students of your regular office hours, always be there (e.g., a live webcam they see by clicking on a link,) and have a lot of office hours at easy to remember times.

Re: Show HN: I made a cheap alternative to college-level math & physics tutoring

#200
This looks amazing! Also, I had no idea that tutoring was over $100/hour, but it makes sense, being a specialized skill that's employed on a freelancer basis (meaning half or more time is spent traveling or finding clients).

I've been really frustrated trying to study more advanced math topics (functional analysis, complex analysis, abstract algebra, etc.) that I think are super interesting but are just out of my reach (Tristan Needham's books come to mind). There is the math stackexchange, which is wonderful help from volunteers, but you're not necessarily guaranteed an answer (and definitely not a timely one), sometimes the answers leave out key details ("exercise for the reader"), and I think having videos of worked solutions from tutors will just fill my need better.

I had been thinking that maybe AI would step up here, but I like having human access better.

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