@catrionaagg.bsky.social
Maths teacher, although currently on maternity leave. I aim to share lots of snippets of my lessons using #MathsToday and would encourage you to do the same! Also occasional geometry puzzles 🧩
I've just made a simple one-click revision grid tool.
Here are a few examples:
Easy: mathsbot.com/revise?min=1...
Med: mathsbot.com/revise?min=6...
Hard: mathsbot.com/revise?min=9...
Mess with the URL parameters to see what else you can make.
Every day in Calculus, there's a warm-up on the board as students walk in. Gets them thinking and sets the tone before we even start. A few from this week: Crack the Code, Which One Doesn't Belong?, and four trig derivatives. Low stakes, high engagement. #ITeachMath #MathsToday
In #MathsToday we are deriving Maclaurin Series. Enjoying looping back to lessons on numerical methods, small angles, binomial Series and deriving Eulers formula.
It's like completing the course, only 3 lessons before actually completing the course.
Linear sequences with year 9s in #MathsToday
Trying using tables to structure their thinking and using language of Position to Term rule as opposed to nth term (...then saying that the n stands for positioN...)
Worksheet here: chelekmaths.com/completion-t...
Great opportunity from Ben Orlin. mathwithbaddrawings.com/2026/03/11/p... I loved playtesting for his #mathgame book. Guessing the puzzles will also be such fun!
Little tricky question for Year 11 in #Mathstoday
Standard form is such a lovely topic to weave into other places!
Logarithmic Regression with Year 12 in #mathstoday
Finding that we are needing to scaffold things in #AlevelMaths more this year and we are enjoying putting together resources to help to students organise their thinking!
This is my favourite thing in further maths A Level - teaching hyperbolic functions starting with an area definition:
www.paddymacmahon.com/resources/a-...
(And what I'll be talking about at this year's @meimaths.bsky.social conference!)
#Mathstoday
Year 8 looked at Pie charts today. After some practice with just filling in the tables we drew some without needing a protractor.
(Then some with a protractor)
Awesome roots task by @dandraper.bsky.social
Also an excellent order of operations post here
mrdrapermaths.wordpress.com/2017/04/08/o...
More new A-level revision grids added today:
✨Numerical Methods
✨Sequences and Series
Available at www.draustinmaths.com/a-level-topics
Enjoy!
#ALevelMaths #UKMathsChat #MathsToday
Happy International Women's Day to all the wonderful Maths women - cis and trans - here on Bluesky 😀 #MathsToday
Ooh yes, that was a good one!
5 years since you wrote us a puzzle @catrionaagg.bsky.social 😍
In #mathstoday I showed my students what a 95% confidence interval actually means by using Excel and taking 100 random samples and seeing that the population mean was only within the interval 95% of the time.
Bringing the classic "esti-mystery" to my Calculus class. Students make an initial guess of how many pennies are in the cup, then use derivative rules (power, product, quotient, chain) to narrow down possible values one clue at a time. #ITeachMath #MathsToday docs.google.com/presentation...
Reminded by @xaqwg.bsky.social that I wanted to @geogebra.org this @catrionaagg.bsky.social puzzle. www.geogebra.org/m/fbfzkvhe
Yes I was surprised too! I guess because an angle problem already feels visual… but it’s not as familiar as the bar model, and you need the implicit knowledge of what the sum should be.
I’ve found bar models really help with angle problems. I like how it makes the 180 explicit too
I used another #BlankIsBest slide this week to introduce angles on the straight line.
The bar model underneath each diagram really helped some of my Y7's make sense of the problems I made up.
#MathsToday
Another bit of AI coding this morning. This one for visualising Normal approx of a Binomial distribution. I like being able to specify exactly how I want it to function rather than making do and clunking around with pre-existing stuff. I just don't have a convenient place for public sharing 🫤
International Womens Day is this Sunday, so I thought I'd compile a list of books by and about Women in Mathematics.
The most important question I have for you is: What's missing?
uk.bookshop.org/lists/books-...
#Mathstoday
Year 8 did bar charts today and got to use the scaffolded worksheet I made 4 years ago when doing my teacher training.
Since then added some questions where they have to spot the mistake.
Is there a good source of homework style questions somewhere for mechanics and statistics that are split into year 1 and year 2? #AlevelMaths I have been using Jethwa maths a lot for homework for pure, wondered if there is something similar available for mechanics and statistics. #MathsToday
I like your isosceles triangle solution; I wouldn’t have thought of that approach.
notes.mathforge.org/notes/publis...
#geometrypuzzle #UKMathsChat #mathsky
What warning signs could students pick up on that they might have gone wrong in an answer?
e.g.
- an unexpected negative/decimal answer,
- an answer requiring many more/fewer steps than the number of marks would suggest,
- an answer that would be weird in context (e.g. a taxi costing £3000)
...
YES thanks. It's nice & concise, gets students going on problem-solving when they "don't know what to do". Good general framework for math & more.
I have a list of things I want my Ss to be thinking when they tackle problems, wrote about here:
karendcampe.wordpress.com/2017/05/10/t...
#iTeachMath
In #mathstoday, we are discussing u-sub vs guess and check when evaluating integrals #calculus #iteachmath
But I guess that element of doing things ‘in reverse’ is what makes it feel like a fun puzzle, rather than a procedural question