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Show HN: Math4Fun – Generate kids' math worksheets from their favorite topics

https://app.math4fun.io
1•johngorse•2h ago
I built a small tool called Math4Fun to make math practice more engaging for kids.

The idea came from watching my own kids (8 & 10) lose interest in generic worksheets but stay focused when the problems were about something they cared about — soccer, dinosaurs, space, etc.

How it works: – Choose grade level – Choose an interest/theme – Instantly generate printable math word problems around that theme (PDF format)

It’s not meant to replace full curriculum, but rather to get reluctant kids to practice math without the usual groans.

Stack: Angular (frontend), .NET 8 (backend)

Right now it’s free to try: https://app.math4fun.io

Would love feedback on: – Other features that would make it worth paying for (tracking, adaptive difficulty, editable problems) – Ways to expand into digital interactive mode without losing the printable option – Any pitfalls to watch for in marketing to both parents and schools

Happy to answer any questions about the build, tech stack, or approach.

Trump administration threatens to strip Harvard University of lucrative patents

https://www.theguardian.com/us-news/2025/aug/09/trump-administration-harvard-patent-review
1•andsoitis•5m ago•0 comments

Subversive of What? (1948)

https://www.theatlantic.com/magazine/archive/1948/08/subversive-of-what/643363/
1•Jtsummers•7m ago•0 comments

Galileo's telescopes: Seeing is believing (2010)

https://www.historytoday.com/archive/history-matters/galileos-telescopes-seeing-believing
1•hhs•8m ago•0 comments

Official Prompt Optimizer for GPT-5

https://platform.openai.com/chat/edit?models=gpt-5&optimize=true
1•ayushnangia16•21m ago•0 comments

Google is killing millions of web links to save a few bucks

https://www.washingtonpost.com/technology/2025/08/01/google-shuts-down-link-shortener/
4•pseudolus•38m ago•2 comments

Democratizing Access to Alternative Assets for 401(K) Investors

https://www.whitehouse.gov/presidential-actions/2025/08/democratizing-access-to-alternative-assets-for-401k-investors/
1•harporoeder•39m ago•0 comments

Exploring AI Memory Architectures (Part 2): MemOS Framework

https://blog.lqhl.me/exploring-ai-memory-architectures-part-2-memoss-system-and-governance-framework
1•lqhl•40m ago•0 comments

The Linguistics of Brain Rot

https://theamericanscholar.org/the-linguistics-of-brain-rot/
1•gmays•40m ago•0 comments

AI Image Watermarking Faces New Threat from "Unmarker"

https://spectrum.ieee.org/ai-watermark-remover
1•pseudolus•40m ago•0 comments

Exploring AI Memory Architectures (Part 3): From Prototype to Blueprint

https://blog.lqhl.me/exploring-ai-memory-architectures-part-3-from-prototype-to-blueprint
1•lqhl•41m ago•0 comments

Avatarl: Training language models from scratch with pure reinforcement learning

https://tokenbender.com/post.html?id=avatarl
1•neehao•44m ago•0 comments

Apple researchers taught an LLM to predict tokens up to 5x faster

https://9to5mac.com/2025/08/08/apple-research-teaches-llms-to-think-faster/
3•guiambros•55m ago•0 comments

Why good houseguests don't 'make themselves at home'

https://text.npr.org/nx-s1-5467347
1•colinprince•1h ago•0 comments

China's Disastrous Demographic Outlook

https://twitter.com/MoreBirths/status/1910780131318374524
4•toomuchtodo•1h ago•6 comments

AI's Overlooked $97B Contribution to the Economy

https://www.wsj.com/opinion/ais-overlooked-97-billion-contribution-to-the-economy-users-service-da6e8f55
2•whatisabcdefgh•1h ago•0 comments

Show HN: Hacker5News is now web available

https://hacker5news.duckdns.org/
1•lafalce•1h ago•0 comments

Where Are They? (2008)

https://nickbostrom.com/papers/where-are-they/
2•doughnutstracks•1h ago•0 comments

Efficient Strategies for Microglia Replacement in the Central Nervous System

https://www.sciencedirect.com/science/article/pii/S2211124720310263
1•bookofjoe•1h ago•0 comments

Show HN: AI Coloring Pages Generator

https://www.colori.io/
1•iliaddh•1h ago•2 comments

EPA Registers Novel(dsRNA) Pesticide Technology for Potato Crops

https://www.epa.gov/pesticides/epa-registers-novel-pesticide-technology-potato-crops
1•bookmtn•1h ago•0 comments

Nanowhisker glue uses ultrasound to form resilient bonds

https://phys.org/news/2025-07-naturally-sourced-nanowhisker-ultrasound-resilient.html
1•PaulHoule•1h ago•0 comments

Just Buy Nothing: A fake online store to combat shopping addiction

https://justbuynothing.com/
43•Improvement•1h ago•5 comments

Tiny Awards 2025 voting is now open

https://tinyawards.net/
1•CharlesW•1h ago•0 comments

Musicians do not demonstrate long-believed advantage in processing sound

https://www.michiganmedicine.org/health-lab/musicians-do-not-demonstrate-long-believed-advantage-processing-sound
2•geox•1h ago•2 comments

GPT-5: Overdue, overhyped and underwhelming. And that's not the worst of it

https://garymarcus.substack.com/p/gpt-5-overdue-overhyped-and-underwhelming
154•kgwgk•1h ago•107 comments

Eighteen Years of Greytrapping – Is the Weirdness Paying Off?

https://nxdomain.no/~peter/eighteen_years_of_greytrapping.html
2•peter_hansteen•1h ago•0 comments

Interactive UI Components for Django using Htmx

https://github.com/edelvalle/djhtmx
1•8organicbits•1h ago•0 comments

Steve Wozniak's Perforated Pads of $2 Bills

https://www.coinbooks.org/esylum_v18n36a40.html
6•CharlesW•1h ago•4 comments

Ask HN: How do you pronounce "gradlew"?

1•higgins•1h ago•2 comments

Show HN: Connective, Back to the Roots

https://www.connective-app.com
1•joacon•1h ago•0 comments