Charlotte McFarlan
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charlottemaths.bsky.social
Charlotte McFarlan
@charlottemaths.bsky.social
790 followers 810 following 380 posts
Ex Maths Teacher now working in ITT
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charlottemaths.bsky.social
This is a long shot but don’t suppose anyone recognises this question from anywhere? #MathsToday
1. (a) Work out =4 x -3 -6 (b) Add brackets to make the statement correct. 2 + 3 × 6 - 4 = 8 (c) Calculate the value of 3 x V9 (5 marks)
September 8, 2025 at 2:13 PM
charlottemaths.bsky.social
Could they only think of 7 colours?? #ALevelResults
A line graph from The Guardian showing 12 most popular A Level subjects. 5 of the subjects all have the same coloured grey line
August 14, 2025 at 12:19 PM
charlottemaths.bsky.social
Interesting from “Learning about mathematics teaching from other countries” by Dylan William (chapter in Debates in Mathematics Education)
“..more surprising, however, is that those who had lost the argument agreed tha they had lost the argument. The focus shifted from what kind of system there should be to making the comprehensive system work. Although, for the reasons discussed above, it is impossible to be sure of the reasons for a country's success, similar political stability appears to have been an important factor in the success of Singapore, Hong Kong, Taiwan, Shanghai an Korea. However, it is far from clear whether policies that take a long time to implement would be possible to implement in countries like England, where ed. cation is treated as something of a political "football" with policies changing with changes of government, and even changes in ministers of education. Looking a other countries may give us ideas. It will never provide us with solutions.”
August 4, 2025 at 12:35 PM
charlottemaths.bsky.social
When you get back from holiday to this package from your boss as a thank you for your hard work 🤓
The book “Things to Make and Do in the Fourth Dimension by Matt Parker”
July 28, 2025 at 7:54 AM
charlottemaths.bsky.social
Got this question from old Dr Frost slides but haven't got an answer or mark scheme. I feel like There are two possible ks and so two possible answers for (d) but the question isn't really worded that way. Any ideas? #MathsToday #ALevelMaths
May 16, 2025 at 6:54 AM
charlottemaths.bsky.social
World’s cheapest gym in a #CoreMaths question
Core Maths exam question showing monthly gym prices for different ages. Under 21s and over 65s pay £9 a month. Everyone else pays £12 a month
May 10, 2025 at 12:51 PM
charlottemaths.bsky.social
Who on #EduSky knows where I am and what I’m up to?
Image of rooftops
April 13, 2025 at 3:59 PM
charlottemaths.bsky.social
How do we know which x to make the subject here to get an 'appropriate iteration formula'? #MathsToday
The equation x^3 -2x^2+19=0 has a root in the interval (-3,-2). Use an appropriate iteration formula to find an approximate solution to 2 d.p.
April 2, 2025 at 3:47 PM
charlottemaths.bsky.social
In #MathsToday I have seen several incorrect formulae triangles for speed and this shocker from a Y13. Graphs and formulae all the way
April 1, 2025 at 2:29 PM
charlottemaths.bsky.social
Is this a rule of probability? Feels right but I'm not sure and using it seems to be causing some issues... #ALevelMaths #MathsToday
P(B) = P(B|A) + P(B|A')
March 6, 2025 at 5:06 PM
charlottemaths.bsky.social
Interesting choice of colours here. Is @miattafahnbulleh.bsky.social trying to distance herself from Labour? Most interesting thing is I know for a fact she isn’t my MP. I moved in the boundary changes and @elliereeves.bsky.social is my MP
Leaflet with a photo of Miatta Fahnbulleh MP with pink and orange colour theme. Leaf twist says “I’m Your MP” on the front.
February 24, 2025 at 4:58 PM
charlottemaths.bsky.social
This formula is in the Edexcel A Level formula sheet but I’m not really sure they need it. Is there anything this is needed/useful for? Don’t think it’s referenced in the textbook #MathsToday #ALevelMaths
A formula for P(A given B)
February 22, 2025 at 4:48 PM
charlottemaths.bsky.social
Way to rub it in on Valentine’s Day @teachertapp.bsky.social
Screenshot of Teacher Tapp question asking if teachers mention their partner to their class
February 14, 2025 at 5:53 PM
charlottemaths.bsky.social
Saw this on New York Times games and assumed I was looking for assembly theses from @jameshandscombe.bsky.social
Screenshot from Strands - New York Times word game - where the theme is “Westminster assembly”
February 8, 2025 at 9:03 AM
charlottemaths.bsky.social
Another, 'I don't get this in the textbook' question. This is just a mistake right? We should be using the z-score for 0.9 which is 1.2816 (not 1.6449) right? #CoreMaths #MathsToday
The lifetimes of Superbulbs are normally distributed with a standard deviation of 35. A random sample of five Superbulbs were tested and the number of hours they lasted were recorded. They were: 2130 2543 2450 2654 2481 Calculate a 90% confidence interval for the mean lifetime of Superbulbs. SOLUTION 2130 + 2543 + 2450 + 2654 + 2481 = 12258 12 258 51 - = 2451.6 A probability of 0.95 in the tables gives a z-score of 1.6449. 90% confidence interval for mean is 2451.6 + 1.6449 * 35 hours V5 That is, 2451.6 $ 25.7 hours or 2425.9 to 2477.3 hours
January 27, 2025 at 7:28 AM
charlottemaths.bsky.social
Is there a reason to use the standardised normal distribution to find the critical region here? Everything I'm looking at does it this way, but you can get the critical values from Inverse Normal section of your calculator because you know mu and sigma so why do this? #MathsToday #ALevelMaths
A machine produces bolts of diameter D where D has a normal distribution with mean 0.580 cm and standard deviation 0.015 cm. The machine is serviced and after the service a random sample of 50 bolts from the next production run is taken to see if the mean diameter of the bolts has changed from 0.580 cm. The distribution of the diameters of bolts after the service is still normal with a standard deviation of 0.015 cm. a Find, at the 1% level, the critical region for this test, stating your hypotheses clearly. The mean diameter of the sample of 50 bolts is calculated to be 0.587 cm. b Comment on this observation in light of the critical region.
January 26, 2025 at 8:55 PM
charlottemaths.bsky.social
Am I bugging? Thought TES jobs would be it’s own section. Not even sure what section it comes under? Newspaper? @teachertapp.bsky.social
Screenshot of question from Teacher Tapp asking how you found your last job
January 10, 2025 at 10:40 PM
charlottemaths.bsky.social
Teacher version of meal-prep
Screenshot from Google Classroom showing homework called “Sparx Maths” scheduled each week for the next 5 weeks
January 7, 2025 at 4:02 PM
charlottemaths.bsky.social
I did it today!
Curve of pursuit in a square coloured in Curve of pursuit in a square coloured in Curve of pursuit in a square coloured in Curve of pursuit in a square coloured in
December 19, 2024 at 9:51 PM
charlottemaths.bsky.social
Meanwhile…https://www.bbc.co.uk/news/articles/c3vrw9pd16do
Screenshot with headline “Government department spends £1200 on two folders”
December 10, 2024 at 6:35 PM
charlottemaths.bsky.social
Another fun one!
Maclaurin series using hyperbolic
December 10, 2024 at 5:06 PM
charlottemaths.bsky.social
Let’s test that out… This one was fun! Didn’t hurt my brain too much as I remembered it from last year but definitely hurt some of theirs
A screenshot of a question where a sequence of numbers is defined iteratively and then students need to prove by induction that the nth term is given by 3^n(n+1)
December 10, 2024 at 5:06 PM
charlottemaths.bsky.social
Okay, but how large? #MathsToday #ALevelMaths
Screenshot of a slide saying “The Central Limit Theorem allows us to say X bar is approximately normally distributed, even if the original population distribution is not normally distributed. However, we require the sample size to be large for the normal distribution to be a good approximation”
December 3, 2024 at 6:03 PM
charlottemaths.bsky.social
Oh sorry, questions would help in that second one
Screenshot from a Dr Frost lesson on chain rule
November 18, 2024 at 7:17 PM
charlottemaths.bsky.social
Screenshot from a Dr Frost lesson on chain rule Screenshot from a Dr Frost lesson on chain rule
November 18, 2024 at 7:16 PM