David Cox
@dlcmaths.bsky.social
Maths teacher in Singapore - maths, board games, crosswords, banjo
Lovely exercise
Small Angle Approximation with #Alevelmaths in #MathsToday - always like using Variation Theory to zoom in on possible misconceptions!
June 3, 2025 at 11:33 PM
Lovely exercise
Reposted by David Cox
The online version of the @chalkdustmag.bsky.social 2024 Christmas card is now available at mscroggs.co.uk/blog/112.
It includes a link to a printable A4 version (@teachers: this can fill an end of term maths lesson!)
You can also still buy physical cards at mscroggs.co.uk/cards.
It includes a link to a printable A4 version (@teachers: this can fill an end of term maths lesson!)
You can also still buy physical cards at mscroggs.co.uk/cards.
Christmas card 2024
As usual, I spent some time this November, designing this year's Chalkdust puzzle Christmas card (with some help from TD).
mscroggs.co.uk
December 4, 2024 at 9:05 AM
The online version of the @chalkdustmag.bsky.social 2024 Christmas card is now available at mscroggs.co.uk/blog/112.
It includes a link to a printable A4 version (@teachers: this can fill an end of term maths lesson!)
You can also still buy physical cards at mscroggs.co.uk/cards.
It includes a link to a printable A4 version (@teachers: this can fill an end of term maths lesson!)
You can also still buy physical cards at mscroggs.co.uk/cards.
Reposted by David Cox
With the new complex mode, we can do some more fun things, like this low-res Julia Set viewer! www.desmos.com/calculator/p... #mathsky #iteachmath
Julia 2
www.desmos.com
November 22, 2024 at 10:29 AM
With the new complex mode, we can do some more fun things, like this low-res Julia Set viewer! www.desmos.com/calculator/p... #mathsky #iteachmath
Reposted by David Cox
Just saw that discussion of the weird and seemingly paradoxical mathematical result,
1+2+3+4+... = -1/12
is making the rounds again; I wrote an explanation of it that discusses how all is not as it appears some years ago.
skullsinthestars.com/2014/01/18/i...
1+2+3+4+... = -1/12
is making the rounds again; I wrote an explanation of it that discusses how all is not as it appears some years ago.
skullsinthestars.com/2014/01/18/i...
Infinite series: not quite as weird as some would say
Updated with a third footnote clarifying my use of the term "diverge," thanks to suggestion by Evelyn Lamb, who has also written an excellent discussion of the problem with the video. At the end of t...
skullsinthestars.com
September 9, 2024 at 1:17 AM
Just saw that discussion of the weird and seemingly paradoxical mathematical result,
1+2+3+4+... = -1/12
is making the rounds again; I wrote an explanation of it that discusses how all is not as it appears some years ago.
skullsinthestars.com/2014/01/18/i...
1+2+3+4+... = -1/12
is making the rounds again; I wrote an explanation of it that discusses how all is not as it appears some years ago.
skullsinthestars.com/2014/01/18/i...
Reposted by David Cox
Denise shares a HS variation from when Joe Schwartz and I were doing pathway games. This one is a real brain challenge and lets students play with exponents. denisegaskins.com/2024/08/26/m... #mathgame
Math Game Monday: Exponent Pickle
This game challenges students to think creatively about exponents and orders of magnitude. Many parents remember struggling to learn math. We hope to provide a better experience for our children. And ...
denisegaskins.com
August 27, 2024 at 12:02 AM
Denise shares a HS variation from when Joe Schwartz and I were doing pathway games. This one is a real brain challenge and lets students play with exponents. denisegaskins.com/2024/08/26/m... #mathgame
Reposted by David Cox
Excellent from James Timpson - important thoughts about leadership
August 13, 2024 at 8:08 AM
Excellent from James Timpson - important thoughts about leadership
A really lovely idea and set of tasks from @natbanting and others - Oops, I forgot... natbanting.com/oops-i-forgot/
Oops, I forgot…
Welcome to Oops, I forgot… ! This page represents my ongoing attempt to curate a collection of ideas of a task structure that I invented while playing with teaching moves that instigate, ampl…
natbanting.com
August 13, 2024 at 8:06 AM
A really lovely idea and set of tasks from @natbanting and others - Oops, I forgot... natbanting.com/oops-i-forgot/
Another lovely article from @quantamagazine.bsky.social www.quantamagazine.org/how-base-3-c...
How Base 3 Computing Beats Binary | Quanta Magazine
Long explored but infrequently embraced, base 3 computing may yet find a home in cybersecurity.
www.quantamagazine.org
August 10, 2024 at 11:30 AM
Another lovely article from @quantamagazine.bsky.social www.quantamagazine.org/how-base-3-c...
