Everyone has probably played with dominoes. At some point in your childhood, chances are that you tried this game: Line up a bunch of dominoes in a row and then knock one over. Soon the rest of the dominoes topple in a chain reaction. I'm not sure why this is fun, but it is. But how about something even cooler? What if you have a small domino knocking over a bigger domino? This is indeed possible. But is it possible to ramp up the domino size so much that a huge domino could tip over and crush a car? This was the goal in a recent episode of MythBusters Jr., where I am the science consultant. Physics research has shown that a domino can knock over another one that is 1.5 times taller. OK, this is what makes physics so cool. We don't just study protons and black holes. Physicists also write papers about dominoes. Check out this paper on arXiv.org. Also, there is this much older paper (from 1983) in which someone described this taller domino crash as a way to demonstrate a … [Read more...] about The Sensible Math of Knocking Over Absurdly Large Dominoes
Snail bob 8 cool math
David A. Lieb, Associated Press Updated 7:16 am PST, Sunday, December 2, 2018 FILE - In this Aug. 31, 2018 file photo, supporters of Missouri's redistricting ballot measure hold signs behind former state Sen. Bob Johnson as he serves as their spokesman during a press conference outside the Cole County Courthouse in Jefferson City, Mo. Voters approved Constitutional Amendment 1 on the Nov. 6 ballot. It is unique among redistricting reforms adopted by a number of states in recent years because it requires Missouri's state legislative districts to be drawn using a new mathematical formula to try to achieve "partisan fairness" and "competitiveness" after the 2020 Census. less FILE - In this Aug. 31, 2018 file photo, supporters of Missouri's redistricting ballot measure hold signs behind former state Sen. Bob Johnson as he serves as their spokesman during a press conference outside ... more Photo: David A. Lieb, AP … [Read more...] about Missouri turns to math formula to deter gerrymandering
There is no doubt that this BESTEK Snail USB Charger is absolutely adorable, but it is also very beneficial. So if you require a few more accessible USB ports on your work desk or out in the field with your laptop but aren't thrilled with the usual boring designs available in most stores, then I have a feeling this Snail USB Charger might be precisely what you have been looking for. This is why I'm excited to announce that AP and BESTEK have teamed up to give away 40 of them, and there is even a 10% off coupon available in the text below for every single one of you who would like to purchase one outright. This snail-themed home and travel charging station comes equipped with a robust 4-port USB desktop charger and a 4 ft. of cable, which should easily reach most outlets from a desk. Along with those 4 USB ports (5V 2.4A Max), you also get a single USB Type-C quick charger (5V 3A Max) that's great for charging most of your newer Type-C devices. There is an included LED … [Read more...] about We’re giving away 40 BESTEK ‘Snail USB Chargers,’ plus 10% off coupons for everyone else [US]
BELLEVUE, Wash.--(BUSINESS WIRE)--Apr 25, 2018--DreamBox Learning® published The EdTech Efficacy Handbook today to arm education decision makers with resources to guide the critical evaluation of learning technologies in the classroom. This handbook offers examples of the kinds of independent efficacy studies and district use cases educators and district leaders should seek out and validate before investing in education technology, and shares best practices for evaluating those studies.Independent third-party research into the efficacy of education technology tools provides the most impartial and unbiased assessment, and therefore offers the most valid insights into how technology may impact student outcomes. Yet a recent survey found that only 20 percent of education technology developers said they used third-party evaluators.“Our district needed a solution to help implement small group math instruction across Fayette County elementary schools, but we wanted to invest with … [Read more...] about DreamBox Learning® Releases EdTech Efficacy Handbook to Empower School District Leaders to Critically Evaluate Math Learning Programs and Software
Everyone knows I like to analyze the trailers of upcoming movies—in particular, movies that I'm excited about. In this case, it's Incredibles 2. I have high hopes for this one since the first Incredibles was really great. In the trailer, we see Mr. Incredible doing his job—helping out with math homework (that's one of the things dads do). Here is how that goes down. Dash: "That's not the way you're supposed to do it, dad. They want us to do it this way." Mr. Incredible: "I don't know that way—why would they change math? Math is math. Math is math!" This is what makes a great movie. There are probably quite a few parents that can relate to this. But who is right? Is math math? Or are you supposed to do it some other way? How about an example? Solve the following: Timmy has 2,314 pieces of candy that he want to share between among his group of 8 friends. How many pieces of candy does each friend get? Yes, I think that's a silly question—but I also think that … [Read more...] about Asks: What’s the Right Way to Solve a Math Problem?