Math Bratt. Mathwire. Dy/dan. Geometry « Math Mistakes. What would you predict? Here are some twitter responses: Here’s your answer key… First Place: Second Place: Third Place I keep on seeing this in my Geometry classes this year. Tasked with finding the area of a right triangle, kids move toward the hypotenuse even if two of the other sides are given.
I’m pretty convinced — based on talking to kids and looking at their work — that this is all about how they see right triangles. Decimals are hard. What would we even want the student to do here if he’s working in decimal? That’s what I’m getting out of this mistake right now: the deviousness of decimal representation, and the way it can obscure numerical properties. How about you? Lots to notice here, including the formula that the student is using for the area of a triangle.
Another interesting instance where additive and multiplicative reasoning get entangled when working with similar figures. I wonder if the student would’ve made the same mistake with “scaling by 2.” What interesting mistakes! Tech Tools Perfect for Teaching Common Core Math Standards. *ISTE Workshop: Transitioning to the Common Core with Google Apps – Join me!
The Common Core Standards for math stress real world relevance, creative problem solving, collaboration and communication. “One hallmark of mathematical understanding is the ability to justify…why a particular mathematical statement is true or where a mathematical rule comes from” (Common Core Standards). Encouraging students to engage with math actively is easier to do when educators explore technology. goo.gl/oyEHI Yummy Math: Collection of Real Life Scenarios Easily search a collection of real world scenarios by category or math level. Google Maps: Math Map Challenges Maps can be used for so much more than getting from point A to point B. For a fabulous blog post on using Google Maps to create math maps, check out Tom Barrett’s blog titled “Maths Maps.” Google Docs: Collaborate While Problem Solving Google Docs: Debate “The Best Buy” Creately: Group Modeling, Flowcharts, & Diagramming.
The Innovative Educator. Dan Meyer | WatsonMath.com. The IPL Cycle and the Hidden Efficiency of Encouraging Student Invention The reason that Dan Meyer’s blog is a must read for me is that his posts, in addition to providing examples of great teaching ideas, are filled with links to scholarly articles to back up statements he makes. I find … Continue reading Spending the Holidays Catching up on Reading Math Blogs I subscribe via email to a lot of math blogs. They are always entertaining and often give me new insights and ideas. I call this reading my “research” (a bit lighter research than I did in my grad course days). … Continue reading An open letter to Dan Meyer about his Qualifying Paper Those of you who read my blog know that I am a fan of Dan Meyer’s 3-Act approach to problem solving. Mary Dooms’ Grade 6 Wiki – Great Resources! Dan Meyer Video from 3 Years Ago I found an early video from Dan Meyer.
Dan Meyer’s new site…101qs Dan Meyer, who hosts a wonderful math blog has developed an interesting new site, called 101 questions. M&Ms Activity and Google Forms. Every year I like to do an activity with M&Ms; such as probability and odds, or percentages. The sorting of all the classes data is a _itch though. Then it dawned on me; GOOGLE FORMS!! Why didn't I think of this before? Here's my thought. On my class website will be a link to a google form (it looks like a survey) where the students just enter how many of each color M&M they have in their bag. After the students are done with their work, as a class we could take a look at the information and have whatever discussions we need to have. Should we try it? Go buy a bag of plain M&Ms. Click here to review the results. Don't forget to scroll down in the results to see the pie chart.
Your thoughts and suggestions are always welcome!! Go Figure! What If You Grew At The Rate Of Grass? Settings Every Blogger User Should Know#.T9U_ZCnhkIY.twitter. This is a post I had simmering in the back of my mind for a while until this morning when someone asked how I was able to publish posts so quickly. The truth is that while sometimes I do write a bunch of posts in quick succession, I often use the scheduling tool in Blogger to publish posts. I use the scheduling tool when I know I will be away from my computer or think that I won't have time to write on a particular day. For example, this coming weekend I'll be home but I have a lot of things to do that will keep me from writing new blog posts so I've already written and scheduled posts that will appear live on Sunday.
Click on the images below to view them in full size and see the details contained within them. How to schedule posts: In the new Blogger interface. In the old Blogger interface. How to prevent publishing your email address in RSS feeds: I often see Blogger users publishing their email addresses in RSS feeds. In the new Blogger interface. How to back-up your Blogger blog. Thoughts.