Mr. Fred's Tech Talks

What happens when a classroom codebreaking challenge leads to a remarkable piece of history?Mr. Fred explores Code Girls by Liza Mundy, the story of American women whose secret work helped break German and Japanese codes during World War II. Meet teacher-turned-codebreaker Dot Braden and discover Genevieve Grotjan’s contribution to solving the Japanese diplomatic cipher known as PURPLE.Along the way, we make sense of encryption, connect wartime secrecy to everyday privacy, and celebrate the people behind the technology. It’s a conversation for parents, educators, history fans, and anyone who enjoys a good puzzle.This week’s Tech Challenge: create and decode a secret message with someone using a simple Caesar cipher. All you need is paper, a pencil, and a little curiosity.Read Mr. Fred’s Code Girls book review:https://www.getmecoding.com/book-review-code-girls/

How did video games go from a handful of colored blocks to worlds filled with realistic faces, reflections, shadows, and light?In this episode of Mr. Fred’s Tech Talks, we follow the evolution of video game graphics from early Atari-era pixels to sprites, 3D polygons, textures, GPUs, and ray tracing, all without turning this into a computer science lecture.Along the way, we discover something even more interesting: better technology doesn't automatically make a better game. Early game designers had very little memory and processing power, so every pixel mattered. Those limitations forced programmers and artists to become remarkably creative. Today, games like Minecraft and modern pixel-art titles can look blocky by choice rather than necessity.That leads to a bigger lesson for kids, parents, educators, and anyone who likes to build things:Constraints can create creativity.This Week's Tech Challenge: The 8-Bit ChallengeCreate an 8×8 grid that has just 64 squares and try to make a picture someone else can recognize. Use graph paper, LEGO bricks, colored pencils, sticky notes, or whatever you have nearby. Don't add more squares. The limitation is part of the challenge. Then show your creation to someone without telling them what it is.Can they figure it out? If not…debug it!In this episode:What a pixel actually isWhy early video games looked blockyHow sprites became 3D modelsWhat polygons and GPUs actually doHow textures and lighting create realismRay tracing explained simplyWhy Minecraft doesn't need to look realisticHow limitations can make designers more creativeThe 8-Bit Tech ChallengeWhat was the first video game that made you stop and think, “Wow…that looks amazing”?Come find me at GetMeCoding.com and tell me.Follow Mr. Fred's Tech Talks wherever you listen so the next episode shows up automatically, and share this one with somebody who remembers spending a few too many quarters at the arcade.

You probably scanned a QR code this week.Maybe it opened a restaurant menu, a ticket, a payment page, or a website. Point your phone at a strange collection of black-and-white squares and somehow it knows what to do.But how?In this episode of Mr. Fred’s Tech Talks, Mr. Fred pulls back the curtain on QR codes and explains what is actually happening when your phone scans one.You’ll discover why QR codes aren’t simply “website buttons,” what those three big squares in the corners are doing, why damaged QR codes can sometimes still work, and how error correction helps recover missing information.There’s also an important cybersecurity twist. A QR code can hide where a link is taking you, which means scammers can use fake codes to lead people toward fraudulent login or payment pages. No need to fear QR codes, but it is worth remembering one simple habit: pause and verify before you tap.Then try this episode’s Mr. Fred Tech Challenge: The QR Code Stress Test. Create a QR code, cover a small portion of it, scan it again, and keep experimenting until you discover how much damage it can handle.It’s a simple experiment involving data, coding, computer vision, error correction, cybersecurity, and a bunch of little squares.Learn more and explore additional technology activities at GetMeCoding.com.Follow GetMeCoding on Facebook, Instagram, LinkedIn, and YouTube.Keep learning. Keep building. Keep tinkering. And keep asking why.

What happens when the technology on Mr. Fred's Tech Talks actually... talks?This week, I'm handing the questions over to Milo, the name I've given the AI assistant I use inside ChatGPT, for a free-flowing conversation about my first week back in the college classroom.And after nearly three decades of teaching, something happened this week that genuinely made me smile.I watched a group of first-year students who didn't know each other begin talking, connecting, and eventually sitting together. It was a small moment, but after what I saw during and immediately following the pandemic, it felt significant.That leads Milo and me into a much bigger conversation.What should college actually feel like? How can teachers create spaces where students want to participate? What do professors think about after everyone leaves the classroom? Where does AI belong in learning? And why might two simple words, “show me,” become increasingly important in an AI-powered world?We also talk about something that isn't found on the syllabus: students seeing their teachers experiment, make mistakes, reset, and try again.Because sometimes those are the lessons students remember.In this episode:Milo, my AI assistant, takes over as interviewerWhat surprised me about this year's incoming studentsWhy seeing students connect again mattersThe power of asking someone to “show me”Using AI to enhance learning without replacing itWhy professors sometimes leave class wondering, “Did I land that?”Letting students see teachers make mistakesWhy college should be an experience, not just a sequence of assignmentsThis week's curiosity-driven Tech ChallengeTech Challenge: Ask someone starting something new, “What are you curious about right now?” Then do the most important part: listen.And if you're the one starting something new, find one thing you don't understand yet and explore it. Ask. Try. Experiment. Use AI to help you understand it, but don't simply ask AI to do it for you.Keep playing. Keep tinkering. Keep exploring. And most importantly, keep asking questions.Find more from Mr. Fred at GetMeCoding.com.

“Have you tried turning it off and on again?”It may be the most famous piece of tech advice ever given. It is also surprisingly effective.In this episode of Mr. Fred’s Tech Talks, Mr. Fred takes a fun look at what is actually happening when a computer, router, app, or other piece of technology gets restarted.Why does a reboot clear up frozen programs? What happens to memory? Why can a device suddenly start working again even though nothing was physically repaired?The answer comes down to one important idea: state.Modern computers are juggling countless processes, services, connections, and temporary pieces of information at the same time. Occasionally, something gets stuck, confused, or out of sync. Restarting gives the system a chance to stop, clear temporary conditions, reload what it needs, and return to a known starting point.Along the way, Mr. Fred shares examples from the classroom, explains RAM with a messy-workbench analogy, and reveals why restarting your router can sometimes fix a connection that insists everything is fine when it clearly is not.And no, restarting will not fix a cracked screen.Probably.In this episode:Why programs sometimes freezeWhat RAM actually doesWhat a “memory leak” meansWhy different parts of a computer can get out of syncWhat happens during a restartWhy routers and updates sometimes need rebootsWhy restarting is a useful troubleshooting step, but not magicThis Week’s Tech Challenge: The Restart ExperimentThe next time something stops working, do not reboot immediately.First ask:What exactly is not working?Then identify what still works.Restart the device and see what changes.You are not just performing an ancient IT ritual. You are running a simple troubleshooting experiment.Because sometimes one of the best ways to understand technology is to stop and ask:Why does that actually work?Visit GetMeCoding.com for more tech explainers, coding ideas, resources, and episodes of Mr. Fred’s Tech Talks.

Someone hands you a phone, laptop, controller, or some other piece of technology and asks, “Do you know how to make this work?”And you have absolutely no idea.Even after decades of working with technology, Mr. Fred still has those moments. And maybe that's the point.In this episode of Mr. Fred's Tech Talks, we explore why being “good with technology” isn't about knowing every app, device, coding language, or AI tool. Technology changes too quickly for any of us to know everything.What matters may be what we do when we don't know.Mr. Fred explores why asking questions can be more valuable than immediately providing answers, why we shouldn't always “steal the struggle” from someone trying to solve a problem, and what can happen when we simply let someone else become the expert.Plus, this week's Tech Challenge requires no software, no new account, and no AI prompt. Just two words:“Show me.”Whether you're a parent, teacher, grandparent, student, tech professional, or simply someone trying to keep up with an ever-changing technological world, this episode is a reminder that curiosity still counts.In this episode:Why nobody can possibly know every technologyWhat we lose when every answer becomes instantaneousWhy struggle and debugging are important parts of learningHow asking questions encourages problem-solvingWhy kids and students sometimes need to become the expertsThe “Show Me” Tech ChallengeKeep playing. Keep tinkering. Keep exploring.Mr. Fred's Tech TalksGetMeCoding.com