A Coloring Book about Group Theory
coloring-book.co
coloring-book.co
FWIW: I've seen districts where parents don't care, and she's student taught in some of these. It is terrible, as the kids aren't there to learn, the teachers are stressed out and unhappy, and the parents don't give a damn. The place where she is now is a college prep school. Hard core academic criteria to graduate, not just passing tests. Strong incentives from parents to kids to work hard, though not all do.
(The flagging system is in serious need of review or overhaul. At the very least, users should be required to provide a reason, which is then made publicly visible as anonymous comments.)
Mods also override flags and rollback the submission time on certain stories, particularly when they're substantive or offer new information.
FWIW, I couldn't figure out how to use this site. I tried scrolling down and clicking around and nothing was happening. Eventually I spotted the "next page" link at the very bottom, but I imagine some of the flags came due to similar reasons.
In any case, page usability has never been a valid reason for flagging a site. Flags are usually reserved for sites that are grossly off-topic, sleazy, etc. Which again makes me wish flag reasons were a thing.
I didn't mean to imply that it was flagged for usability. I was saying I didn't even notice there was more to the site at all. People may have thought it was just a splash screen.
It's more than a bit presumptuous to say we know better than the mods. Unlike downvoting (which is just straight-up broken at this point), the flagging/vouch system is primarily to aid the mods in their duties. If it made more work for them, they'd have to overhaul it. But it alleviates work, so it's working fine.
Also, you did vouch it. Which is just another way of saying that the current system worked.
I now read HN mostly through either @hnrobot at Telegram or http://hckrnews.com/
Both those will let me see everything I find interesting that has been posted while nit having to worry about checking twice an hour to catch interesting stories before they are flagged to death.
Their silly CSS makes it impossible to copy-paste and filter by [dead], but suffice to say the headlines aren't flattering. The system seems to be working quite well.
The idea that a massive amount of quality is slipping through the cracks due to flagging is suspect at best. Anyone who spends significant time on /new will know just how much cruft is caught by flags. You just don't see how well it's working because wading through /new is tedious (to put it very mildly).
Here's an example:
https://plus.google.com/+AlexKudlick/posts/MWNRWTRATgA
I've been building tools lately; for now, a graph editor.
Hit me up if you're interested in talking about tools for creating this sort of content, I'd be interested to know more about your approach.
My email is in my profile.
edit: btw, raphael.js looks good, I wanted to animate trees for a long time.
The basic ideas of group theory are definitely accessible to grade schoolers, and even the fancier parts of an undergraduate group theory course (Sylow theorems, etc.) are accessible to high school students who go through the work.
I wouldn’t hesitate to recommend Nathan Carter’s lovely book Visual Group Theory to any bright 15 year old. But for a (say) 10-year-old, just learning about the symmetries of shapes and tilings is plenty of useful and interesting math.
Now, we can debate the merits of exposing children to groups before they can understand group theory. But learning group theory means learning (0) the axiomatic definitions of group, subgroup, coset, etc. (1) the main theorems in group theory and their proofs.
Or you can click the back button faster :D Clicker game experience helps here.
Maybe this should be called “a book that illustrates gadgets that happen to have group structure”.
This would be like asking the Nano developers how they plan to support Emacs-Lisp macros.
In other words, adjusting the title (to prevent wrong expectations) would be more productive than expanding the scope far beyond what the author(s) had in mind.
This book is about symmetry and group definitions, but it has no or very little details about generic properties of groups.
The previous comment is about a book that no one has written, that is a coloring book for students of a math major in the university, probably in the 2nd or 3rd year. In this (unwritten) book the idea is to study the general theorems about groups, and in each case give some visual examples to color and apply the theorem.
In particular, in this book they don't use $Z_2$ that is the usual notation in math (at least here). They use $C_2$ that is more usual in physics. And for the selection of the groups I guess the author has some interest in crystallography.