jrlarsen

Interested in setting aside the magical prompter and learning some web standards skills the old fashioned way? You can sign up for my online Web Components course for free until Oct 31 with the code markitzero. If you find it useful, please consider letting folks know! 🎃

First day of #TPAC is as overwhelming as expected. (This is my second go at this particular rodeo.) Web testing discussions, CSS/ARIA debates, on to Web DX and then the evening hackathon. And tomorrow night, after another full day, Brian and I will be doing a live @igalia Chats!

You can subscribe to the newsletter to read the issue that went out today and receive future emails directly in your Inbox: 👉🏻 buttondown.com/SaraSoueidan/

CSS-Tricks is back in good hands. 🙌🏻 Happy to see this and happy for you @geoffgraham.me !

Leaving #BCME10 feeling challenged, inspired and grateful! Amazing conversations, fresh perspectives and the chance to connect with so many wonderful people. A brilliant reminder of how much we can learn from one another! 🐝

Does your org want to move away from Big Tech and use a browser based in Europe? We're building Vivaldi Enterprise: our secure, private browser built for organisations of all sizes—from businesses and public institutions to schools and Starfleet Constitution-class starships. vivaldi.com/enterprise/

💙 Imagine a day with people who love maths as much as you do! ✨ Discover fresh ideas 🤝 Make new connections 💡 Find inspiration for your classroom MathsConf42 is more than a conference. It’s a community! 🎟️ Get your ticket and join us: completemaths.com/community #MathsConf42

Tomorrow, October 16th, marks Practical Accessibility's third birthday. 🎂 To celebrate, I am gifting everybody 25% off for the next 48 hours 🎁 Individual and team licenses alike! The discount is automatically applied during checkout—no code is needed. 👉🏻 practical-accessibility.today Enjoy! #a11y

Outstanding stuff from the always outstanding TetraLogical!

Still time to book for this year’s MathsJam UK Gathering - a weekend of recreational maths talks, activities and fun, in a conference centre in Milton Keynes. Find out more and join us by visiting mathsjam.com/gatheri...

💡 Got a maths teaching idea worth sharing? From clever classroom strategies to resources that make learning click, your experience could inspire another teacher! 🎤 Host a workshop at #MathsConf42 on 14 November 2026. Submit your proposal: completemaths.com/community 🚀

I’m looking to connect with university lecturers and staff. We offer student tickets for @ffconf.org, but they’re easy to miss, and I’d love to give the next generation of web developers the chance to attend a great indie event. If anyone can contact please drop me comment here I can follow up.

Need sortable tables? My table-sortable web component adds accessible, customizable sorting to ordinary HTML tables—and they still work when JavaScript doesn’t. www.aaron-gustafson.com/notebook/sor...

🔥 New blog post: The best way to use icons in Web UIs What if I told you, you could use CSS to *insert* and *tweak* icons without touching any HTML? And that you can manage them alongside your other design tokens? lea.verou.me/blog/2026/ic...

My collection of 30+ digital manipulatives. All free and simple to use. Recently updated with the much requested drawing tools! mathsbot.com/manipulatives

Continuing our series “How … works”. With today @11ty.dev! This post walks through its build pipeline, from config to the files written to disk. spinalcms.com/blog/how-11t...

📚 How can we make the move from Year 6 to Year 7 Mathematics smoother? Explore KS2 pedagogy, SATs expectations, resources, language and conceptual foundations, and discover practical ways to create KS3 lessons that feel familiar, accessible and inspiring. 🎟️ completemaths.com/community #MathsConf42

HTML Can Do That by @chrisburnell “HTML has been gobbling up swathes of what used to be JavaScript’s remit. This page lists a bunch of dynamic functionality that we can now achieve with just HTML.” chrisburnell.com/html-can-… Great reminder of all of the advances we’ve seen!

So, today I built `<calc-input>`. It’s a custom input element that accepts mathematical formulas — such as 2 + 3 or (2 + 3) * 4 — and automatically toggles between showing the formula on focus and the calculated result on blur. → brm.us/calc-input

More details about MathsBot membership, which gives access to many hundreds of amazing tasks, the MathsBot curriculum, and ad-free mode, can be found here: mathsbot.com/membership Very much worth it!

Anti-Prime Day starts…NOW! 🥳 Today through midnight on 10/7, enjoy free shipping site-wide, all while supporting local, independent bookstores.

Update: I tidied up the Example-Problem pair tool a bit today. My favourite feature is the ability to compare any two objectives side by side - making use of variation. Here's a simple example for the volume of a sphere. mathsbot.com/unitExample?...

Tomorrow at 6 am CEST I'm sharing 19.5 things you didn’t know about accessibility in HTML and CSS online at @inclusivedesign24.bsky.social Join us for a full day of great talks on accessibility! inclusivedesign24.org/2026/schedule/

It’s not finished yet but could this be useful for any #MFL teachers? 5minutemfl.com #LanguageLearning #EduSky #MFLBluesky #langchat

Lately, I've been exploring CSS-only custom elements. They're pretty rad! #html #css #webcomponents dev.to/stuffbreaker...

It’s not finished yet but could this be useful for any #MFL teachers? 5minutemfl.com #LanguageLearning #EduSky #MFLBluesky #langchat

“Let me make it clear: without people at the top of their game sharing their experience and knowledge—regardless of whatever ‘game changing’ technology is in place—we are pulling up the ladders and committing our industry to stagnation and death.” bell.bz/youll-miss-p...

I've rolled this out to some of the other manipulatives now. - Cuisenaire rods - Dienes Blocks - Place Value Counters - Prime Factor Tiles - Fraction Wall mathsbot.com/manipulative... #MathsbotToday

Do you have a passion for maths and love sharing ideas? We're looking for workshop presenters for #MathsConf42 📍 Trinity Academy, Barnsley (S70 6FP) 📅 14th November 2026 Submit your workshop proposal by emailing Events@completemaths.com or complete the form here: completemaths.com/community

I’m looking for my next Head of Maths role in the South East. Experienced Head of Maths, currently teaching, with a strong interest in curriculum development, and improving departmental consistency. I also run Mr Mathematics. If you know of a suitable opportunity, please get in touch.

There’s only two months to go until this year’s Big MathsJam UK Gathering - if you haven’t already booked your tickets, head to mathsjam.com/gatheri... to find out all the details and grab your spot. Previous events have fully sold out, so make sure you don’t miss your chance!

Just a quick reminder, we're offering a huge 35% discount on all courses if you use the coupon code PRICEFALL at checkout. piccalil.li/courses/

This year we are launching A Level statistics. Reaching out to anyone who has delivered this already? #AlevelStats Appreciate a retweet to reach more people 🙏🏽

Any other #ALevelMaths teachers also teach #ALevelStats?

teaching-vacancies.service.gov.uk/jobs/teacher... anyone fancy a nice part time job in south man with me!

This is one of my favourite things I’ve made. Here’s the link if you’ve not seen it before. mathsbot.com/puzzles/prim...

Sub 2000

Web Awesome styles your words, not just your components. Wrap your blog post, docs, or changelog in one class & every heading, list, blockquote, & code block lands on your theme's scale. A 3xs–5xl type scale handles the rest, + CSS @scope stops leaks. blog.fontawesome.com/web-awesome-...

New podcast episode! This is from our new series of podcasts where Craig Barton and I discuss some of the issues that have been raised on hodspace.com. podcast.mrbartonmaths.com/230-hod-spac...

First #MathsToday of the new term! Y10 were decomposing algebraic expressions into their individual factors using Prime Factor Tiles. This then led into multiplying and dividing expressions.

A summary of some of #rED26 although there’s more to come. fantasticmaths.substack.com/p/nobody-imp...

There are some lovely activities in here that could be used for getting to know new classes, or for that maths club your senior leadership has been on at you to start...

🚨 Double announcement! 🚨 The next two MC events are confirmed: 🔥 MC42📍 Trinity Academy, Barnsley 📅 14 November 2026 🔥 MC43 📍 Penrice Academy, St Austell 📅 20 March 2027 🎟️ Tickets for MC42 are on sale now, with MC43 tickets coming soon. completemaths.com/community

And Year 13 did some complex numbers questions from @tlmaths.bsky.social and @danihosford.bsky.social's excellent Core Pure Part 2 book: sites.google.com/view/tlmaths... It has really lovely questions, and nicely brings in ideas from other topics in clearly labelled questions. I highly recommend.

My reflections from #MathsConf41 and a great day of CPD and friendships. www.atulranatutors.co.uk/mathsconf41-...

There was lots of food for thought in this session from @mrmattock.bsky.social at #MathsConf41 : probability as a measure; introducing theoretical and experimental probability alongside each other; connecting different representations

Thank you, Liverpool, for a fantastic #MathsConf41! 🌟 What a brilliant day talking all things maths and sharing practical ideas for revision. Read my full reflection below 👇

⭐⭐ 4️⃣ ➕⭐⭐ 4+ in GCSE maths is a big deal! However, the tallest bar is the 153,255 who got a Grade 3 this year. Can you help me find them? 💻 9x free webinars, every Monday at 5pm 👨‍💻 Small online lessons (max 6 students) @ £15 a session More info & sign up: grade3to4bynovember.carrd.co

We're approaching 400 members on hodspace.com which was only launched one month ago. People are using it to ask for advice, chat about maths teaching, share resources etc. I’m loving it! If you join in September you get four whole weeks for free!

All set for #MathsConf41! ➗📐 I’m so excited for today and looking forward to attending some brilliant workshops, meeting fellow maths enthusiasts and gathering lots of new ideas. Notebook ready. Maths geek mode fully activated! 🤓😂 Time to get our maths on! 🧮 #MathsCPD #ProfessionalDevelopment