Catriona Agg
@catrionaagg.bsky.social
Maths teacher. I aim to share lots of snippets of my lessons using #MathsToday and would encourage you to do the same!
Also occasional geometry puzzles 🧩
Also occasional geometry puzzles 🧩
Reposted by Catriona Agg
I've collated some data from UCAS for the top 25-ish universities that our students (from the Hull area) progress to to study STEM subjects, comparing the published entry criteria, the most common grade profile for students currently on the course, and the lowest grades of a student on the course...
November 7, 2025 at 10:09 PM
I've collated some data from UCAS for the top 25-ish universities that our students (from the Hull area) progress to to study STEM subjects, comparing the published entry criteria, the most common grade profile for students currently on the course, and the lowest grades of a student on the course...
Reposted by Catriona Agg
In #MathsToday pupils vote which of these were equivalent to the original expression. 1 vote Mario, 15 votes Luigi, 1 vote Bowser and 20 votes Peaches. One pupil explained she voted for Peaches because she just knew you multiply. So we then looked at it expanded and why multiplying works.
November 6, 2025 at 7:36 PM
In #MathsToday pupils vote which of these were equivalent to the original expression. 1 vote Mario, 15 votes Luigi, 1 vote Bowser and 20 votes Peaches. One pupil explained she voted for Peaches because she just knew you multiply. So we then looked at it expanded and why multiplying works.
Reposted by Catriona Agg
Finishing up Quadratic Inequalities in #Mathstoday with some tricky compound questions
November 6, 2025 at 5:32 PM
Finishing up Quadratic Inequalities in #Mathstoday with some tricky compound questions
Reposted by Catriona Agg
In #mathstoday our team did some training on using Desmos to teach using one of these lovely webinar recordings from @tombutton.bsky.social and @sarahdenisonmei.bsky.social.
amsp.org.uk/teachers/tea...
amsp.org.uk/teachers/tea...
Teaching with Desmos webinars - AMSP
amsp.org.uk
November 5, 2025 at 6:28 PM
In #mathstoday our team did some training on using Desmos to teach using one of these lovely webinar recordings from @tombutton.bsky.social and @sarahdenisonmei.bsky.social.
amsp.org.uk/teachers/tea...
amsp.org.uk/teachers/tea...
Reposted by Catriona Agg
#Mathstoday
Year 11 moved onto Trigonometry again, so to start we need to recap last year's work so used this very nice mixed exercise from Dr Austin.
Year 11 moved onto Trigonometry again, so to start we need to recap last year's work so used this very nice mixed exercise from Dr Austin.
November 5, 2025 at 3:23 PM
#Mathstoday
Year 11 moved onto Trigonometry again, so to start we need to recap last year's work so used this very nice mixed exercise from Dr Austin.
Year 11 moved onto Trigonometry again, so to start we need to recap last year's work so used this very nice mixed exercise from Dr Austin.
Reposted by Catriona Agg
#Mathstoday
Started Surds off with the year 10 with a challenge to write each number as a product of a square number and an integer. Led on nicely to introduce how to simplify Surds.
Started Surds off with the year 10 with a challenge to write each number as a product of a square number and an integer. Led on nicely to introduce how to simplify Surds.
November 4, 2025 at 4:16 PM
#Mathstoday
Started Surds off with the year 10 with a challenge to write each number as a product of a square number and an integer. Led on nicely to introduce how to simplify Surds.
Started Surds off with the year 10 with a challenge to write each number as a product of a square number and an integer. Led on nicely to introduce how to simplify Surds.
Reposted by Catriona Agg
spent last week thrashing out expanding brackets with a grid/area model last week with grade 1-3 yr 10s, felt like I was going nowhere fast and encountering lots of difficulties.
This morning did reverse process to factorise with same model. Insane success rate.
#mathstoday
This morning did reverse process to factorise with same model. Insane success rate.
#mathstoday
November 3, 2025 at 8:33 PM
spent last week thrashing out expanding brackets with a grid/area model last week with grade 1-3 yr 10s, felt like I was going nowhere fast and encountering lots of difficulties.
This morning did reverse process to factorise with same model. Insane success rate.
#mathstoday
This morning did reverse process to factorise with same model. Insane success rate.
#mathstoday
Reposted by Catriona Agg
#Mathstoday
Had my interactive whiteboard stop working for half the lesson. The second half wasn't interactive but at least they could see questions. Thank god for textbooks
Half a lesson of indices practice textbook then half on fractional powers on the board.
Had my interactive whiteboard stop working for half the lesson. The second half wasn't interactive but at least they could see questions. Thank god for textbooks
Half a lesson of indices practice textbook then half on fractional powers on the board.
November 3, 2025 at 4:52 PM
#Mathstoday
Had my interactive whiteboard stop working for half the lesson. The second half wasn't interactive but at least they could see questions. Thank god for textbooks
Half a lesson of indices practice textbook then half on fractional powers on the board.
Had my interactive whiteboard stop working for half the lesson. The second half wasn't interactive but at least they could see questions. Thank god for textbooks
Half a lesson of indices practice textbook then half on fractional powers on the board.
Reposted by Catriona Agg
In #MathsToday I taught both my classes how to find and prove Points of Inflection and we even had enough time to differentiate sinx from first principles ahead of diving deeper into Differentiation tomorrow. #ALevelMaths
November 3, 2025 at 5:07 PM
In #MathsToday I taught both my classes how to find and prove Points of Inflection and we even had enough time to differentiate sinx from first principles ahead of diving deeper into Differentiation tomorrow. #ALevelMaths
Reposted by Catriona Agg
Been teaching Quadratic Inequalities and Trig Graphs to my year 11s recently so put this together for them as a challenge!
Will also give it to my year 12s and see how they do...
#MathsToday #Alevelmaths
Will also give it to my year 12s and see how they do...
#MathsToday #Alevelmaths
November 3, 2025 at 5:02 PM
Been teaching Quadratic Inequalities and Trig Graphs to my year 11s recently so put this together for them as a challenge!
Will also give it to my year 12s and see how they do...
#MathsToday #Alevelmaths
Will also give it to my year 12s and see how they do...
#MathsToday #Alevelmaths
Reposted by Catriona Agg
New! My 193rd gems post.
Ideas, resources and updates for maths teachers. 💎
www.resourceaholic.com/2025/10/5-ma...
Hat tips to follow.
#mathstoday #ukmathschat
Ideas, resources and updates for maths teachers. 💎
www.resourceaholic.com/2025/10/5-ma...
Hat tips to follow.
#mathstoday #ukmathschat
October 30, 2025 at 8:31 PM
New! My 193rd gems post.
Ideas, resources and updates for maths teachers. 💎
www.resourceaholic.com/2025/10/5-ma...
Hat tips to follow.
#mathstoday #ukmathschat
Ideas, resources and updates for maths teachers. 💎
www.resourceaholic.com/2025/10/5-ma...
Hat tips to follow.
#mathstoday #ukmathschat
Reposted by Catriona Agg
I love breaking the unspoken rule about fraction diagrams (all pieces congruent, not just equal in area). Here are a few of my favourite non-standard representations. A one radian sector fills half the unit square, the curves y = x² and y = √x enclose 1/3 of the square. Can you come up with more?
October 30, 2025 at 8:14 AM
I love breaking the unspoken rule about fraction diagrams (all pieces congruent, not just equal in area). Here are a few of my favourite non-standard representations. A one radian sector fills half the unit square, the curves y = x² and y = √x enclose 1/3 of the square. Can you come up with more?
Reposted by Catriona Agg
Create Odd One Out activities using any of the 70 different topics available (or a mixture of them)
This one is on equations of straight lines.
generator.interactive-maths.com/maths-questi...
This one is on equations of straight lines.
generator.interactive-maths.com/maths-questi...
October 29, 2025 at 8:59 AM
Create Odd One Out activities using any of the 70 different topics available (or a mixture of them)
This one is on equations of straight lines.
generator.interactive-maths.com/maths-questi...
This one is on equations of straight lines.
generator.interactive-maths.com/maths-questi...
Reposted by Catriona Agg
#Mathstoday
Year 10 simplified algebraic fractions, looked at the main worksheet and went... They need more scaffolding before they do that.
Year 10 simplified algebraic fractions, looked at the main worksheet and went... They need more scaffolding before they do that.
October 27, 2025 at 3:58 PM
#Mathstoday
Year 10 simplified algebraic fractions, looked at the main worksheet and went... They need more scaffolding before they do that.
Year 10 simplified algebraic fractions, looked at the main worksheet and went... They need more scaffolding before they do that.
Reposted by Catriona Agg
In #MathsToday (actually Friday) I gave my year 12 students a question from 1961 which I found in book my colleague found in a charity shop.
They were loving it. Plus I was loving the discussion on how one would solve it using numerical methods without a calculator.
They were loving it. Plus I was loving the discussion on how one would solve it using numerical methods without a calculator.
October 25, 2025 at 4:28 PM
In #MathsToday (actually Friday) I gave my year 12 students a question from 1961 which I found in book my colleague found in a charity shop.
They were loving it. Plus I was loving the discussion on how one would solve it using numerical methods without a calculator.
They were loving it. Plus I was loving the discussion on how one would solve it using numerical methods without a calculator.
Reposted by Catriona Agg
Lovely #oracy work on indices in #MathsToday. We haven't covered negative indices yet but this got them pondering negative indices and considering non integer values for a and b as well as 0 and 1. Looking forward to delving deeper next lesson.
October 24, 2025 at 7:44 PM
Lovely #oracy work on indices in #MathsToday. We haven't covered negative indices yet but this got them pondering negative indices and considering non integer values for a and b as well as 0 and 1. Looking forward to delving deeper next lesson.
Reposted by Catriona Agg
Give your students an edge for Oxford & Cambridge interviews!
Free, online 30-minute practice to build confidence, gain expert guidance and experience of interview format.
24 Nov-12 Dec
Apply now 👉 buff.ly/FpCOZ1O
#OxbridgeMaths #TeacherSupport
Free, online 30-minute practice to build confidence, gain expert guidance and experience of interview format.
24 Nov-12 Dec
Apply now 👉 buff.ly/FpCOZ1O
#OxbridgeMaths #TeacherSupport
October 24, 2025 at 3:06 PM
Give your students an edge for Oxford & Cambridge interviews!
Free, online 30-minute practice to build confidence, gain expert guidance and experience of interview format.
24 Nov-12 Dec
Apply now 👉 buff.ly/FpCOZ1O
#OxbridgeMaths #TeacherSupport
Free, online 30-minute practice to build confidence, gain expert guidance and experience of interview format.
24 Nov-12 Dec
Apply now 👉 buff.ly/FpCOZ1O
#OxbridgeMaths #TeacherSupport
Reposted by Catriona Agg
Never mind ‘Night at the Museum’, we’re talking MATHS in Museums 🔦
Did you know a key factor in building number confidence is seeing the value of numeracy in everyday life? Educator Tommaths (he/him) 🏳️🌈🏳️⚧️ shares 5 things museums don’t tell us about maths!
https://ow.ly/SECu50XhoUw
Did you know a key factor in building number confidence is seeing the value of numeracy in everyday life? Educator Tommaths (he/him) 🏳️🌈🏳️⚧️ shares 5 things museums don’t tell us about maths!
https://ow.ly/SECu50XhoUw
October 24, 2025 at 9:30 AM
Never mind ‘Night at the Museum’, we’re talking MATHS in Museums 🔦
Did you know a key factor in building number confidence is seeing the value of numeracy in everyday life? Educator Tommaths (he/him) 🏳️🌈🏳️⚧️ shares 5 things museums don’t tell us about maths!
https://ow.ly/SECu50XhoUw
Did you know a key factor in building number confidence is seeing the value of numeracy in everyday life? Educator Tommaths (he/him) 🏳️🌈🏳️⚧️ shares 5 things museums don’t tell us about maths!
https://ow.ly/SECu50XhoUw
Reposted by Catriona Agg
October 23, 2025 at 4:44 PM
Reposted by Catriona Agg
In #mathstoday overheard a year 10 leaving our Underground Maths ECA say to his pal ‘I’m getting smarter every week!’ 🤩
Can recommend using the website for an extra curricular. Its layout is fun and the resources are ideally scaffolded to allow them do most of the exploring themselves.
Can recommend using the website for an extra curricular. Its layout is fun and the resources are ideally scaffolded to allow them do most of the exploring themselves.
October 24, 2025 at 2:07 AM
In #mathstoday overheard a year 10 leaving our Underground Maths ECA say to his pal ‘I’m getting smarter every week!’ 🤩
Can recommend using the website for an extra curricular. Its layout is fun and the resources are ideally scaffolded to allow them do most of the exploring themselves.
Can recommend using the website for an extra curricular. Its layout is fun and the resources are ideally scaffolded to allow them do most of the exploring themselves.
Reposted by Catriona Agg
Hi maths community. Which ready made Desmos resource does anyone recommend for introducing students to Desmos as a graphing tool? I’m a little tight on time and so am hoping to use one of the 100s that seem already prepared! Thank you.
October 24, 2025 at 1:58 AM
Hi maths community. Which ready made Desmos resource does anyone recommend for introducing students to Desmos as a graphing tool? I’m a little tight on time and so am hoping to use one of the 100s that seem already prepared! Thank you.
Reposted by Catriona Agg
October 24, 2025 at 12:59 PM
Y13 did their first set of integration looky-likeys in #MathsToday. Looking forward to lots more of this in the next few weeks!
The last one was a bit mean (I put it there to slow down the fast finishers) but they did manage it when I gave them the right substitution. #ALevelMaths
The last one was a bit mean (I put it there to slow down the fast finishers) but they did manage it when I gave them the right substitution. #ALevelMaths
October 20, 2025 at 7:37 PM
Y13 did their first set of integration looky-likeys in #MathsToday. Looking forward to lots more of this in the next few weeks!
The last one was a bit mean (I put it there to slow down the fast finishers) but they did manage it when I gave them the right substitution. #ALevelMaths
The last one was a bit mean (I put it there to slow down the fast finishers) but they did manage it when I gave them the right substitution. #ALevelMaths
Reposted by Catriona Agg
Introduced my Year 7s to solving equations this week. Made a worksheet to focus on the single skill of identifying the inverse operation for each one-step equation. It also got students used to writing the operation on BOTH sides.
#Mathschat #MathsToday #AusMathsChat
#Mathschat #MathsToday #AusMathsChat
October 19, 2025 at 9:56 AM
Introduced my Year 7s to solving equations this week. Made a worksheet to focus on the single skill of identifying the inverse operation for each one-step equation. It also got students used to writing the operation on BOTH sides.
#Mathschat #MathsToday #AusMathsChat
#Mathschat #MathsToday #AusMathsChat
Reposted by Catriona Agg
Hey! My first time making Futility Closet! www.futilitycloset.com/2025/10/17/s... Of course on @catrionaagg.bsky.social's coat tails/cool puzzle.
Square Deal - Futility Closet
From Catriona Agg’s endlessly rewarding Twitter feed: The three smaller squares are the same size. What’s the angle? (The outermost shape too is a square.)
www.futilitycloset.com
October 19, 2025 at 3:14 AM
Hey! My first time making Futility Closet! www.futilitycloset.com/2025/10/17/s... Of course on @catrionaagg.bsky.social's coat tails/cool puzzle.