Dale Chapman's Avatar

Dale Chapman

@dalechapman.bsky.social

Maths teacher in Hitchin, Hertfordshire. Enjoys the align function in PowerPoint.

680 Followers  |  198 Following  |  359 Posts  |  Joined: 12.05.2023
Posts Following

Posts by Dale Chapman (@dalechapman.bsky.social)

Oh sorry I didn't realise this was yours! I thought it might have been a Year 8s. I thought that Les Mis and The World of Yesterday were ambitious reads!

04.03.2026 12:17 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

"For silver level i just read Les Miserables"

04.03.2026 11:01 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Thanks, I am teaching decision for the first time this year and finding this. Ill keep posting anything i produce

01.03.2026 12:15 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Preview
Preparing for the TMUA (Test of Mathematics for University Admission) This on demand course offers specialist tuition to support students preparing for the TMUA (Test of Mathematics for University Admission).

With @ox.ac.uk and @cam.ac.uk Maths courses now requiring TMUA for 2027 entry onwards it seemed a good time to remind you of the @meimaths.bsky.social TMUA On Demand course. Free for students from state-funded schools & colleges. Perfect to recommend to Year 12 students 😁
mei.org.uk/course/prepa...

26.02.2026 12:55 β€” πŸ‘ 4    πŸ” 1    πŸ’¬ 0    πŸ“Œ 1

One of the best things about teaching is getting asked questions that you've never thought about before.
Isn't it odd that for powers we have an invisible '1' and for roots it's an invisible '2'.

26.02.2026 14:37 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Where can I find this??

26.02.2026 13:21 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Teaching this for the first time this year and have only been using the past paper material-- will be great if there are other things people suggest!

25.02.2026 10:59 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

So given that aΓ·a=1

And a number multiplied by its reciprocal is 1

Division by a fraction must be equal to multiplication for the reciprocal for that to he true?

14.02.2026 21:55 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

At this point I'm afraid to say I'm not sure i can explain it beyond 'dividing by a fraction is equivalent to multiplying by the reciprocal of that fraction' -- how far do you feel it should he explained / what am I missing?

14.02.2026 21:43 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
Video thumbnail

In #MathsToday I got my Y7s playing with the Frogs Project from nrich
For which I put together an applet for them
www.mrchapmanmaths.com/algebra/frogs
Featuring
-> Campaign mode where they have to get the optimal solution before moving on
-> Colour adjustable frogs
-> Confetti cannon when you win.

13.02.2026 16:08 β€” πŸ‘ 6    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

#MathsToday #ALevelMaths #FurtherMaths

11.02.2026 12:13 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Video thumbnail

#TodayInMaths Dijkstra's Algorithm!
For which I have put together a digital tool: www.mrchapmanmaths.com/ks5/dijkstra

Happy to hear feedback on it! Think I have worked out the major kinks.

11.02.2026 12:08 β€” πŸ‘ 6    πŸ” 3    πŸ’¬ 2    πŸ“Œ 0

Thanks for testing and spotting this Stuart

05.02.2026 17:28 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Video thumbnail

Quick Sort!
Including Custom lists and 'Edexcel mode' where the Pivot must be selected as the middle entry (or right of this if there is a conflict)

If anyone can let me know how quick sort is done on other boards I can update it.

www.mrchapmanmaths.com/ks5/quicksort
#ALevelMaths #MathsToday

05.02.2026 15:21 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

#ALevelMaths
#FurtherMaths

05.02.2026 14:18 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Edexcel QuickSort - students choose the central value as a pivot OR the right of the two if there are two central values.

I heard a rumour on the grapevine it is the left of the two for AQA and different in other exam boards... Can anyone confirm/deny/clarify?

05.02.2026 14:18 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 2    πŸ“Œ 0
Post image

Bubble sort practice
Including optional modes where you must write number of comparisons and swaps made
And a 'manual stop' mode where you say when you want the sort to stop (i.e. after a pass made with no swaps).

www.mrchapmanmaths.com/ks5/bubblesort

#mathstoday #alevelmaths

04.02.2026 22:38 β€” πŸ‘ 4    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Thanks Tom. I'm enjoying this adventure a lot. Been working on sorting algorithms stuff today. Any requests for things to host do give me a shout

04.02.2026 20:00 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Video thumbnail

Teacher Mode also an option.
Get your class to draw the column addition on their whiteboards and play as you roll the digits.
-> Optimal solution is shown when you submit an answer so your class can see if they got the best solution.

#MathsToday

04.02.2026 14:08 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
Video thumbnail

Fun little game that I've played for years with classes and now available as a web app.
-> Randomly generate a number 1-9 and place it in the column addition with a target of 1000
-> Option to swap a pair of digits, and to bin one you don't like.
www.mrchapmanmaths.com/number/targe...

04.02.2026 14:06 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
Wednesday 4th February
Rosa Parks was born on this day 1913 in Alabama.  She is remembered for a moment of defiance in December 1955 when she refused to move from seats reserved for white people on a Montgomery bus.
Parks was was not the first to defy the state’s racial segregation laws this way.  Earlier the same year Claudette Colvin and Mary Louise Smith had both been similarly arrested.  However Colvin and Smith were not seen as the the right face to be a cause cΓ©lΓ¨bre by local activists.  Colvin was an unmarried teen and Smith’s family were vulnerable to being smeared in the press.
However, Parks was 42 had worked as a seamstress and for the NAACP investigating racial violence.  She was married and a regular churchgoer, exactly the type of trusted citizen civil rights leaders hoped would unite the city against unpopular segregation laws. 
A boycott of Montgomery Buses was organised on the day of her trial, which became permanent when she was found guilty.  The boycott lasted 381 days and was ended in court when the segregation of buses was found to be unconstitutional. 
The victory came at a cost to Parks.  She and her husband lost work, faced threats, and struggled financially.  In 1957 they moved to Detroit, where Rosa kept campaigning for civil rights, later working with black Congressman John Conyers on civil rights issues.  She died in 2005 aged 92.
Is it acceptable to pick the most presentable person for a campaign? What does it mean for people who are brave but don’t fit society’s expectations?
Is doing the right thing worth disrupting your life for?

Wednesday 4th February Rosa Parks was born on this day 1913 in Alabama. She is remembered for a moment of defiance in December 1955 when she refused to move from seats reserved for white people on a Montgomery bus. Parks was was not the first to defy the state’s racial segregation laws this way. Earlier the same year Claudette Colvin and Mary Louise Smith had both been similarly arrested. However Colvin and Smith were not seen as the the right face to be a cause cΓ©lΓ¨bre by local activists. Colvin was an unmarried teen and Smith’s family were vulnerable to being smeared in the press. However, Parks was 42 had worked as a seamstress and for the NAACP investigating racial violence. She was married and a regular churchgoer, exactly the type of trusted citizen civil rights leaders hoped would unite the city against unpopular segregation laws. A boycott of Montgomery Buses was organised on the day of her trial, which became permanent when she was found guilty. The boycott lasted 381 days and was ended in court when the segregation of buses was found to be unconstitutional. The victory came at a cost to Parks. She and her husband lost work, faced threats, and struggled financially. In 1957 they moved to Detroit, where Rosa kept campaigning for civil rights, later working with black Congressman John Conyers on civil rights issues. She died in 2005 aged 92. Is it acceptable to pick the most presentable person for a campaign? What does it mean for people who are brave but don’t fit society’s expectations? Is doing the right thing worth disrupting your life for?

Rosa Parks was born on this day 1913 in Alabama.  She is remembered for refusing to move from seats reserved for white people on a Montgomery bus in December 1955.
She was not the first to defy the law, but  as a working, married regular churchgoer she was considered the right face to be a cause célèbre by local activists. 
A boycott of Montgomery Buses was started on the day of her trial and lasted 381 days. The boycott ended when segregation on buses was found to be unconstitutional. 
But victory came at a cost. Parks and her husband lost work, faced threats, struggled financially and moved away from Alabama after the boycott.
Is doing the right thing worth disrupting your life for?

Rosa Parks was born on this day 1913 in Alabama. She is remembered for refusing to move from seats reserved for white people on a Montgomery bus in December 1955. She was not the first to defy the law, but as a working, married regular churchgoer she was considered the right face to be a cause célèbre by local activists. A boycott of Montgomery Buses was started on the day of her trial and lasted 381 days. The boycott ended when segregation on buses was found to be unconstitutional. But victory came at a cost. Parks and her husband lost work, faced threats, struggled financially and moved away from Alabama after the boycott. Is doing the right thing worth disrupting your life for?

Wednesday's TGT takes a look at Rosa Parks. I hope many will know her story already. But it's interesting to note she wasn't the first to defy the racist segregation of Montgomery's buses, but civil rights leaders did think she was the right person to be the face of change. bit.ly/TutorGroupThink

03.02.2026 19:09 β€” πŸ‘ 5    πŸ” 3    πŸ’¬ 0    πŸ“Œ 0

Oh yeah

03.02.2026 20:09 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Glowing feedback, thanks for sharing

03.02.2026 19:03 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Theyre so variable. When I went to the Louvre they had audio guides on Louvre branded 3DSs, they were awesome. Think they have another setup now

31.01.2026 17:22 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Post image

Correlation β‰  Causation

29.01.2026 22:10 β€” πŸ‘ 8    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Video thumbnail

Large Data Set revision flashcards
-> Questions marked wrong or partially wrong will appear more regularly in future (memory of this stores locally)
->Option to review weak areas
www.mrchapmanmaths.com/ks5/ldsflash...

#MathsToday
#ALevelMaths

29.01.2026 15:44 β€” πŸ‘ 16    πŸ” 7    πŸ’¬ 1    πŸ“Œ 1
Video thumbnail

I'll be the first to admit I have gone crazy creating digital tools using Gemini vibe coding BUT check out what i've been doing today:

Edexcel GCSE Maths Foundation revision tracker.
RAG rate the skills; you can then later filter by your RAG rating.

www.mrchapmanmaths.com/revision/ede...

28.01.2026 16:26 β€” πŸ‘ 7    πŸ” 4    πŸ’¬ 0    πŸ“Œ 0
Post image

A relief to have passed my NPQLT!

28.01.2026 12:23 β€” πŸ‘ 4    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
Video thumbnail

Needed an isometric drawing tool, asked Gemini to write me one. Available here:
www.mrchapmanmaths.com/geometry/iso...
Includes:
-Adjustable dot thickness
-Editable spacing
-Change dots to lines
-Fill tool
-Colours
-Download button
-Line thickness
-Pan tool
-'Box' Tool
#MathsToday

28.01.2026 12:23 β€” πŸ‘ 5    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

Yes-- vibe coded on Gemini. Further Maths applied topics are relatively under resourced and its just amazing to be able to generate exactly what I want so quickly.

27.01.2026 20:01 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0