@richardtrimble.bsky.social
This *very* nice. The final line reminds me of the similar final line in the approach via the multiple product rule.
(abc)' = a'bc + ab'c + abc'
yields
(x³)'
= (xxx)'
= x'xx + xx'x + xxx'
= xx + xx + xx
= 3x²
(abc)' = a'bc + ab'c + abc'
yields
(x³)'
= (xxx)'
= x'xx + xx'x + xxx'
= xx + xx + xx
= 3x²
October 18, 2025 at 9:55 AM
This *very* nice. The final line reminds me of the similar final line in the approach via the multiple product rule.
(abc)' = a'bc + ab'c + abc'
yields
(x³)'
= (xxx)'
= x'xx + xx'x + xxx'
= xx + xx + xx
= 3x²
(abc)' = a'bc + ab'c + abc'
yields
(x³)'
= (xxx)'
= x'xx + xx'x + xxx'
= xx + xx + xx
= 3x²
From memory a lot of the textbook exercises felt too short
October 17, 2025 at 6:00 PM
From memory a lot of the textbook exercises felt too short
I'm afraid the textbook only came out in the last year i was delivering it so I was quite used to muddling through with items cobbled together from integral and the core maths developers network and others made up by me. Cat van saarloos had some good padlets related to prerelease materials
October 17, 2025 at 6:00 PM
I'm afraid the textbook only came out in the last year i was delivering it so I was quite used to muddling through with items cobbled together from integral and the core maths developers network and others made up by me. Cat van saarloos had some good padlets related to prerelease materials
I sometimes show colleagues in England my old gcse fm CCEA textbook, they can't believe it compared to say AQA L2FM
October 17, 2025 at 5:47 PM
I sometimes show colleagues in England my old gcse fm CCEA textbook, they can't believe it compared to say AQA L2FM
I taught it for about 5 years, my advice is get them using real data sets and asking their own questions about the data. A lot of the content then becomes well motivated. Find out what issues they are interested in and use a chi squared test to investigate. Get them comparing, leads to normal dist
October 17, 2025 at 5:35 PM
I taught it for about 5 years, my advice is get them using real data sets and asking their own questions about the data. A lot of the content then becomes well motivated. Find out what issues they are interested in and use a chi squared test to investigate. Get them comparing, leads to normal dist
See james Taunton's video for more info youtu.be/npG4MwDmDDc?...
How Archimedes First Deduced the Volume of a Sphere
YouTube video by James Tanton
youtu.be
October 11, 2025 at 2:36 PM
See james Taunton's video for more info youtu.be/npG4MwDmDDc?...
With an able y9 class I might justify the volume of a sphere using Archimedies' argument that sphere = cylinder containing the sphere - double cone with both tips at the centre of the sphere. It can follow quite easily from pythagoras which they have seen.
October 11, 2025 at 2:34 PM
With an able y9 class I might justify the volume of a sphere using Archimedies' argument that sphere = cylinder containing the sphere - double cone with both tips at the centre of the sphere. It can follow quite easily from pythagoras which they have seen.
How come I have been teaching the constant product of the diagonal for years but never thought of using the name magic squares...? was this your own worksheet or is it online
October 8, 2025 at 8:59 PM
How come I have been teaching the constant product of the diagonal for years but never thought of using the name magic squares...? was this your own worksheet or is it online
Fun game, just flagging that the entry boxes for the numbers come out one to the left when I play it on my phone! Notoriously difficult to get css right across multiple browsers. This was chrome.
October 7, 2025 at 6:01 AM
Fun game, just flagging that the entry boxes for the numbers come out one to the left when I play it on my phone! Notoriously difficult to get css right across multiple browsers. This was chrome.
Look at your list of finished jobs, I wager it is longer, more meaningful and full of things that are more important.
September 26, 2025 at 6:29 PM
Look at your list of finished jobs, I wager it is longer, more meaningful and full of things that are more important.
Thanks for sharing, a really interesting vision
September 26, 2025 at 6:25 PM
Thanks for sharing, a really interesting vision
For early work im thinking 'Why this and not a table of x and y values?' Seems like additional cognitive load. I might give a table of values, ask to identify points, then ask to link to the x(t), y(t) graphs.
September 23, 2025 at 9:02 PM
For early work im thinking 'Why this and not a table of x and y values?' Seems like additional cognitive load. I might give a table of values, ask to identify points, then ask to link to the x(t), y(t) graphs.
I think the Hessian Matrix has the answers you are looking gor here.
en.m.wikipedia.org/wiki/Hessian...
en.m.wikipedia.org/wiki/Hessian...
Hessian matrix - Wikipedia
en.m.wikipedia.org
August 27, 2025 at 4:35 PM
I think the Hessian Matrix has the answers you are looking gor here.
en.m.wikipedia.org/wiki/Hessian...
en.m.wikipedia.org/wiki/Hessian...
Yes, should be
∂z/∂x = dz/dv × ∂v/∂x
∂z/∂x = dz/dv × ∂v/∂x
August 25, 2025 at 10:57 AM
Yes, should be
∂z/∂x = dz/dv × ∂v/∂x
∂z/∂x = dz/dv × ∂v/∂x
I thought you liked knots and braids?
August 21, 2025 at 6:58 PM
I thought you liked knots and braids?
youtu.be/Xq59DCEaBj8?...
They have a great video essay on their website (with English subtitles available under cc).
Thanks for sharing, it looks amazing and a really thought provoking juxtaposition.
They have a great video essay on their website (with English subtitles available under cc).
Thanks for sharing, it looks amazing and a really thought provoking juxtaposition.
Ausstellungsfilm »Rendezvous der Träume. Surrealismus und Deutsche Romantik«
YouTube video by HamburgerKunsthalle
youtu.be
August 20, 2025 at 8:32 AM
youtu.be/Xq59DCEaBj8?...
They have a great video essay on their website (with English subtitles available under cc).
Thanks for sharing, it looks amazing and a really thought provoking juxtaposition.
They have a great video essay on their website (with English subtitles available under cc).
Thanks for sharing, it looks amazing and a really thought provoking juxtaposition.
We keep the cost as low as possible with a local supplier, have a second hand system and can support with uniform costs if needed so no one is left behind. When you let kids buy any supermarket sweater you can tell who can afford what just by looking.
2/2
2/2
August 19, 2025 at 10:04 AM
We keep the cost as low as possible with a local supplier, have a second hand system and can support with uniform costs if needed so no one is left behind. When you let kids buy any supermarket sweater you can tell who can afford what just by looking.
2/2
2/2
What you call a 'posh blazer' is a matter of equity. None of our students will ever be intimidated by someone in a suit no matter their family background because they wore it at school. Not to mention the sense of pride and unity the uniform brings.
1/2
1/2
August 19, 2025 at 10:04 AM
What you call a 'posh blazer' is a matter of equity. None of our students will ever be intimidated by someone in a suit no matter their family background because they wore it at school. Not to mention the sense of pride and unity the uniform brings.
1/2
1/2
It is great to see all this in one place, a real eye opener in terms of who offers what for me. I hate to tell you this after all that work but you put A and A* the wrong way round in the header.
August 15, 2025 at 6:26 PM
It is great to see all this in one place, a real eye opener in terms of who offers what for me. I hate to tell you this after all that work but you put A and A* the wrong way round in the header.
Yes, I'd be interested in that!
August 5, 2025 at 2:32 PM
Yes, I'd be interested in that!
I haven't done the whole problem but I noticed x=1 is the positive intersection. Then equating derivatives at x=1 gives 'a' rather easily. Not a general method!
July 26, 2025 at 2:17 PM
I haven't done the whole problem but I noticed x=1 is the positive intersection. Then equating derivatives at x=1 gives 'a' rather easily. Not a general method!
Sorry! AI has learned all our bad habits...
July 25, 2025 at 11:59 AM
Sorry! AI has learned all our bad habits...
Just like a typical learner it left the gap between 0 an 1 smaller than the rest.
July 25, 2025 at 11:28 AM
Just like a typical learner it left the gap between 0 an 1 smaller than the rest.
Wow, congrats Teri!
July 19, 2025 at 7:29 AM
Wow, congrats Teri!
Good luck in your new role!
July 17, 2025 at 4:44 PM
Good luck in your new role!