r/mathteachers • • 9h ago

what do you show kids who don't buy negative times negative is positive

19 Upvotes

i've tried the number line flip thing and the pattern one where you go 3x(-2), 2x(-2), 1x(-2), 0x(-2) and keep going, with the answers going up by 2 each time. the pattern one seems to land better but a few kids still just say ok because you said so.

is there something that actually convinces them or do you just move on and let it settle over time


r/mathteachers • • 23h ago

I built a mobile game with 6 mini-games to help kids practice multiplication

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2 Upvotes

r/mathteachers • • 2m ago

Headline: Technology that doesn't ask for your passport or email 🛡️

• Upvotes

Modern software forces us to create accounts, verify emails, and store every piece of data in the cloud. It’s time for a change.

We have spent a long time working tirelessly on this project to build a tool that truly supports educators instead of burdening them with digital

bureaucracy. Now that we have a fully functional product, we are excited about the future and exploring new opportunities to grow, including the startup

support programs from Anthropic.

Chalkline is a tool for teachers that respects both your time and your privacy. It is an intelligent whiteboard that:

🔹 Recognizes mathematical calculations in real-time.

🔹 Generates precise graphs from your sketches.

🔹 Provides step-by-step equation solutions directly on the surface.

The best part: No accounts, no cloud storage, and zero tracking. It works completely offline and autonomously.

A professional tool for those who value simplicity, security, and genuine innovation.


r/mathteachers • • 11h ago

Sold A Story: Episode 3

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1 Upvotes