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Rob Southern

@mrsouthernmaths.bsky.social

Maths teacher - A level specialist. Co-author of "Teaching A Level Maths" with @susanwhitehouse.bsky.social published by the Mathematical Association.

1,067 Followers  |  547 Following  |  512 Posts  |  Joined: 15.08.2024  |  2.0448

Latest posts by mrsouthernmaths.bsky.social on Bluesky

A selection of integrals and the structure of their solutions, linked by an arrow labelled “integrates like”

A selection of integrals and the structure of their solutions, linked by an arrow labelled “integrates like”

Today I realised that “integrates like” is the phrase I’ve been missing for talking about spotting the structure of an integral. #ALevelMaths #MathsToday

15.10.2025 16:32 — 👍 34    🔁 6    💬 4    📌 2

mrsouthernmaths.wordpress.com/wp-content/u...

Something like this?

15.10.2025 12:37 — 👍 2    🔁 0    💬 1    📌 0

##ALevelMaths

12.10.2025 11:16 — 👍 2    🔁 0    💬 0    📌 0
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A hilly one this morning!

12.10.2025 11:13 — 👍 1    🔁 0    💬 0    📌 0

How about "find the minimum value of r to 2dp"?

You could also have a maximum area where they have to round the value of r down, rather than using conventional rounding.

11.10.2025 08:52 — 👍 1    🔁 0    💬 1    📌 0
A quartet of representations of the binomial distributions. Screenshots from https://www.desmos.com/calculator/3ea50eafbc

A quartet of representations of the binomial distributions. Screenshots from https://www.desmos.com/calculator/3ea50eafbc

X ~B (10, 0.4)
Shade the diagrams to represent the probability
P(3 ≤X <6)
and draw a numberline.

X ~B (10, 0.4) Shade the diagrams to represent the probability P(3 ≤X <6) and draw a numberline.

X~B(10,0.4)
Shade the diagrams to represent the probability P(3 ≤ X < 6) and draw a
numberline.

X ~ B(8, 0.7)
Which is larger:
P(X < 5) or P(X = 6)?

X~B(12,0.36)
P(X ≥ c) < 0.5
What is the smallest possible value of c?

X~B(10,0.4) Shade the diagrams to represent the probability P(3 ≤ X < 6) and draw a numberline. X ~ B(8, 0.7) Which is larger: P(X < 5) or P(X = 6)? X~B(12,0.36) P(X ≥ c) < 0.5 What is the smallest possible value of c?

X~B(10,0.4)
Calculate the interquartile range of this distribution.
What is the mode?

X~B(8, 0.7)
P(X ≤ a) < 0.1
What is the largest possible value of a?
P(X ≥ b) < 0.1
What is the smallest possible value of b?

X~B(12,0.36)
P(X ≤ a) < 0.2
What is the largest possible value of a?
P(X ≥ b) < 0.2
What is the smallest possible value of b?

X~B(10,0.4) Calculate the interquartile range of this distribution. What is the mode? X~B(8, 0.7) P(X ≤ a) < 0.1 What is the largest possible value of a? P(X ≥ b) < 0.1 What is the smallest possible value of b? X~B(12,0.36) P(X ≤ a) < 0.2 What is the largest possible value of a? P(X ≥ b) < 0.2 What is the smallest possible value of b?

In #MathsToday I made 40 A Level teachers colour in representations of the binomial distribution.

This is your regular reminder that if you teach #ALevelMaths you should definitely try to join your local Maths Hub’s A Level Pedagogy group. There is some brilliant stuff going on all over England.

08.10.2025 20:18 — 👍 37    🔁 10    💬 1    📌 0

##ALevelMaths

05.10.2025 16:38 — 👍 3    🔁 0    💬 0    📌 0
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Friday night update! Some new algebra resources:
✨Expanding Brackets Name the Film
✨Factorising Decode the Joke
✨Factorising with Bracketed Factors Practice Strips
✨Factorising Quadratics Practice Grid
Freely available at www.draustinmaths.com
#mathstoday #ukmathschat

03.10.2025 19:14 — 👍 23    🔁 6    💬 0    📌 0

Add the numerators, add the denominators! 😃

28.09.2025 10:50 — 👍 1    🔁 0    💬 0    📌 0
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Upping the miles in preparation for the Great South Run in 3 weeks time! 🏃‍♂️

28.09.2025 10:29 — 👍 2    🔁 0    💬 0    📌 0
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Supporting students for the upcoming TMUA/MAT maths entrance exams? Two free resources to help (both with answers) at

www.tes.com/teaching-res...

and

www.tes.com/teaching-res...

19.09.2025 13:30 — 👍 13    🔁 6    💬 0    📌 0

Excited to be running my first session at #Mathsconf39 with @seethelanes.bsky.social

Talking about Variation Theory in #Alevelmaths and how fun it as a guide for writing series of questions!

Here is a set I wrote in #MathsToday for my stats Y12s!

(also the classic misspelling of Natan 🙈)

19.09.2025 17:24 — 👍 10    🔁 3    💬 0    📌 0
Preview
Dr Frost Learning Dr Frost provides an online learning platform, teaching resources, videos and a bank of exam questions, all for free.

That time of year again...

Please share the below booklet with any pupils thinking of studying maths at universities that use interviews as part of the admissions process.

www.drfrost.org/downloadable...

#MathsToday #AlevelMaths

19.09.2025 07:20 — 👍 22    🔁 14    💬 0    📌 0

Teaching #ALevelMaths at Gloucs or Worcs? Interested in working together on "Teaching for Mastery" at A Level and seeing a live lesson in action? Then come and sign up to my workgroup via GLOW Maths Hub on tinyurl.com/yy5ut3uw
First session is on Monday 3rd November at North Bromsgrove High School

18.09.2025 20:43 — 👍 2    🔁 1    💬 0    📌 0

##ALevelMaths

17.09.2025 18:29 — 👍 4    🔁 1    💬 1    📌 0
Preview
Filling in the Gaps With Histograms This blog posts focuses on the sorts of histograms that students see in GCSE Mathematics: histograms with unequal class intervals and where the heights of the bars represent frequency density.&nbsp…

#MathsToday Teaching histograms to year 11 this week and returned to @drrowlandson.bsky.social’s amazing planning series to start. So much deep thought and insight in every post! 🙌 ponderingplanning.wordpress.com/2020/06/05/f...

17.09.2025 14:22 — 👍 17    🔁 7    💬 0    📌 0

When I went on a tour of my daughter's primary school, something like this was on the wall. I stood there for ages trying to work out what "O" stood for.

(I'm used to Units!)

14.09.2025 15:02 — 👍 3    🔁 0    💬 1    📌 0
Pictures from blog post

Pictures from blog post

New! My 192nd gems post. Ideas, updates and resources for maths teachers. 💎

www.resourceaholic.com/2025/09/5-ma...

Hat tips to follow.

#mathstoday #ukmathschat #alevelmaths #iteachmath

13.09.2025 11:52 — 👍 38    🔁 18    💬 4    📌 2

##ALevelMaths

13.09.2025 06:35 — 👍 5    🔁 1    💬 0    📌 0
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Loving the process of planning yr12 quadratics. Wonderful resource from @meimaths.bsky.social Integral, @susanwhitehouse.bsky.social & @mrsouthernmaths.bsky.social.

Wonderful resources to make it easy to plan for problem solving and modelling without endless exercises. ❤️ #alevelmaths

11.09.2025 09:31 — 👍 12    🔁 3    💬 0    📌 0

#ALevelMaths

09.09.2025 17:19 — 👍 8    🔁 2    💬 0    📌 0

#ALevelMaths

06.09.2025 06:47 — 👍 4    🔁 1    💬 0    📌 0

#ALevelMaths

03.09.2025 19:01 — 👍 5    🔁 1    💬 0    📌 0

@ritabrad.bsky.social please can you email me mrsouthernmaths@gmail.com to arrange posting the folders

01.09.2025 06:26 — 👍 1    🔁 0    💬 1    📌 0
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It's that time of year again - your annual reminder that if you're a Maths teacher and looking for suitable resources for your classes across KS3 to KS5 then do check out www.draustinmaths.com. The site is five years old this week 🎉🎉 and in that time it's amassed over 1000 resources! 1/3

31.08.2025 13:32 — 👍 71    🔁 36    💬 10    📌 2

Good luck! 👊🏻

30.08.2025 11:17 — 👍 3    🔁 0    💬 0    📌 0

👊🏻

30.08.2025 09:00 — 👍 3    🔁 0    💬 1    📌 0
A picture of the book "Teaching A Level Maths: Content and Pedagogy"

A picture of the book "Teaching A Level Maths: Content and Pedagogy"

Just a reminder that if you are about to start teaching #ALevelMaths, this book is available from the Mathematical Association @mathematicala.bsky.social online shop. In my completely unbiased opinion, it's really quite useful.

28.08.2025 14:09 — 👍 34    🔁 20    💬 0    📌 3

mrsouthernmaths@gmail.com

26.08.2025 18:34 — 👍 0    🔁 0    💬 1    📌 0

I have been doing Paddy's problem solving questions every day this summer, and I have found a lot of them challenging. As well as enjoying them very much, they have helped me focus on how I teach problem-solving. Here are the top five things that I have come away with. #ALevelMaths

26.08.2025 12:59 — 👍 50    🔁 9    💬 5    📌 0

@mrsouthernmaths is following 20 prominent accounts