# Posts

### April 24, 2015

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9:00 PM | Math Stars - for summer math and more

I have used Math Stars problem solving sets with my girls for several years, and they have always greatly enjoyed them. Math Stars include various puzzles and challenging math problems. They come as PDF files (free and ready to download & use) in sets for grades 1-8. They're great to use for summer math or for some fun problem solving at any time.I tend to use the problems from one grade level below the grade the student is in. One reason I like these so much is the variety of […]

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The concept of an angle in general is related to a process of rotation. Thus, if two rays (half-lines) on a plane have a common beginning points, the angle between them can be viewed as an angle needed to rotate one ray around the common point (strictly speaking, counterclockwise is a positive direction and clockwise is negative) to coincide with another.Provided a unit of measurement of such a rotation (for instance, rotation around a full circle can be set as equal to 360 degree or 2π […]

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6:34 PM | The Role of Reading in Math Class

My more recent endeavors have moved me away from exclusively math and allowed me to enter into the world of literacy, particularly elementary literacy. (Math teachers out there, if you haven’t gotten a chance to sit and participate in a conversation among elementary folks talking about kids learning to read, the essential components of curricula […]

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Dear Desmos, (with the help of Casper Focus)… You made a liar out of me. Two short years later, @Desmos “made a liar out of me” Watch 24:40 @ HCMS on @livestream: http://t.co/94HuPTkf2A https://t.co/Tct5xhJE1H — Cathy Yenca (@mathycathy) April … Continue reading →

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5:43 PM | 5 Maths Gems #28

Hello and welcome to my 28th gems post. This is where I share five teaching ideas I've seen on Twitter.
1. Math Snacks
I spotted a tweet from @fawnpnguyen about the website mathsnacks.com. The website's tagline is 'Smart educational animations, mini-games, and interactive tools that help mid-school learners better understand math concepts'. Check out the animation Atlantean Dodgeball which is

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Finally, the first two books of my math games series are finished and loaded up on Amazon.com (and the other Amazons worldwide). To celebrate, I’m offering an introductory sale price this weekend: $2.99 per book, now through Monday. Math Your Kids WANT To Do Are you tired of flashcards and repetitive worksheets? Now your children … Continue reading They’re Here! Math You Can Play Weekend Sale →

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Please enable two-factor authentication for your WordPress.com account.

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I thought today's warm-up would be quick, but we spent a little while digging deeper. This was the Always-Sometimes-Never statement and what they came up:They were quite sure we were done and then I asked about 1/2 squared. Reluctantly, they figured it out and noticed that the result was smaller than the number squared. Hmmm. We tried 3/2. That one was bigger. So I asked them to try any fraction and see what they got. Two ideas came out of that: the result is smaller if - the number is
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This is already the 5th part of the reviewer solution series for grade 9 MMC. You may check the previous parts in this section. Problem 21: Compute the sum of all the roots of...
The post 2015 MTAP Reviewer for Grade 9 Solutions(21-25) appeared first on Techie Math Teacher.

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12:30 PM | What Worked; What Didn't: Calculator Storage

For the past two years, I've been frustrated by calculator storage in my classroom. I had calculator tubs, but the calculators never seemed to make it back in the tubs. My school provides calculators for all of our students instead of asking our students to purchase their own calculators. Because these are the school's calculators, my students sadly don't take as good of care of them as they should. This summer, I bought three shoe hangers at Tuesday Morning (pretty much my […]

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I created the post below about a week ago, but the API that does the Handwriting recognition costs money. I have currently been "bootstrapping" (I learned that in my reading about start-up funding :) g(Math) and I am closing in on a 4 digit deficit. Granted some of that are yearly sunk costs that are good for another 6 months, but I don't have the funds to support this API.I have always wanted g(Math) to be free. As a teacher, I don't want to charge other teachers to use my app. We already
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I started making math videos with my kids about 4 years ago. One of hopes was that the videos would be useful for other kids because I wanted to show them what it looks like when kids do math. Not that it is necessarily super different than what it looks like when adults do math,…

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8:43 AM | Kunst fachfremd unterrichten (SiS)

[Schule im Schaubild] [Mit fröhlichem Gruß an meine Co, die eine ganz wunderbare Kunstlehrerin ist )

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g(Math) Form Responder with Handwriting Entry will now allow your Form Responders to sketch a Form Response. This is great news for math teachers who want students to show their work (makes me wish I had some touchscreen Chromebooks for my class)!If you read my earlier post on how to deploy your Google Form so responders can use g(Math) to respond, you are up to speed. If not, click here and we will wait for you to come back...OK! So you have deployed your Form and are awaiting your
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5:58 AM | Stamping Feedback

I found the previous stamps I had made so helpful that I got a few more made.

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3:35 AM | April Math Giveaway

CLICK HERE TO ENTER FIVE lucky winners will be chosen to receive my Focus On Fractions Series Ultimate Package PLUS there might be "more" being added to the pot as the month progresses ALSO Contributing to this Giveaway: Chandra Martin from PowerPoint Gaming is sharing Find the Star – Multiplying 3 Digit by […]
Related Math Games:
Mental Math Teaching Tips
BUZZ – A Math Activity to Fill 5 Minutes
Old Maid Math

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3:31 AM | #AprilBlogADay Number Talks

I've been reading about these for so long and finally took the time to fit it in. What fun! The coolest thing is that my students really seemed to enjoy it and bought into it 100%! I started off easy and kept it short the past two days. Yesterday I gave them 56 + 7 Here are some of the responses I got.63 because I know that 56 + 4 is 60 and 7-4 is 3 so 60+3 is 6363 because I counted up from 5663 because I added 6+7 is 13 then 10 plus 50 is 60 and add the 3 […]

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Geometrical points, lines and planes are abstractions, as most other objects of mathematics, like numbers, functions etc. It is appropriate to present definitions of these concepts given by Euclid around 300BC:"A point is that which has no part.""A line is breadthless length.""A straight line is a line which lies evenly with the points on itself.""A surface is that which has length and breadth only.""A plane surface is a surface which lies evenly with the straight lines on itself."As […]

### April 23, 2015

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11:00 PM | On This Day in Math - April 24

Simplicibus itaque verbis gaudet Mathematica Veritas, cum etiam per se simplex sit Veritatis oratio.(So Mathematical Truth prefers simple wordssince the language of Truth is itself simple.)~ Tycho BraheThe 114th day of the year; the sum of the first 114 digits of e after the decimal point, is prime. This is the third consecutive day number with this property. And From Mario Livio: The number of ways of coloring the faces of a cube with 3 different colors is 114.EVENTS1066 Halley's Comet […]

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10:09 PM | Explore MTBoS - How to Help

In case you've missed our tweeting and the Global Math presentation Tuesday, we are running a series over at Explore MTBoS for people new to the community.This week people are reading and commenting on blog posts. I can certainly use the reminder that comments are a good idea when reading. It's been great fun getting email notifications of comments on this blog. We encouraged people to sign up for notifications, so if you respond to their comment they should know. Feel free to do so!Starting on […]

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9:52 PM | Limits ... I have reached it!

We are done with our limits unit, and I made some changes (thanks Meg Craig!). Our summary day was today with a mix of everything. Here is the sheet the students worked on to see what they understood. I like it because it has a mix of algebraic limits, graphical limits, limits they have to draw graphs first for, piecewise functions .... HERE it is. Let me know if you want a word document copy. Funny story about #15. I actually had a problem there and had put the answer in the
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“Haga el producto correcto, correctamente, la primera vez”. Probablemente en alguna oportunidad ha escuchado dicha aseveración que deja de manifiesto que en la gestión de empresas es vital conocer los costos asociados a la calidad y su influencia en la competitividad. Su importancia radica en que nos permite analizar la manera cómo se llevan a cabo […]

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8:24 PM | rehearsals

So, how do you actually help teachers become aware of and work on their decision-making? I suspect one of the reasons teacher educators/professional developers/coaches/administrators so often resort to checklists and best practices is because they're easy: demo the strategy, explain its benefits, show some examples and non-examples, make a ppt, give teachers 5 minutes to practice it in a decontextualized and artificial setting, and go back three weeks later to evaluate on a rubric. […]

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7:26 PM | 311 – HW 8

HW 8 is due Tuesday, April 28, at the beginning of lecture. Work in hyperbolic geometry. Given a triangle , recall that its Saccheri quadrilateral based at is defined as follows: Let be the midpoint of and be the midpoint of . Let be the feet of the perpendiculars from and to respectively. Continuing with […]

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7:20 PM | MFM2P - Day 50 (Factoring, continued)

Today was another lesson study observation day so I did not get to teacher my 2P class. My colleague did, but sadly, as the wifi was down, they did not do the planned Would You Rather. They moved on to talking about different representations of algebraic expressions and started working on this matching activity from the Shell Centre. I LOVE this activity - it is great. There are linear and quadratic expressions, they need to expand and factor, write mathematical expressions in words, match and
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7:16 PM | Equal Products

I come across a lot of puzzles and other maths things online and often save them for later, this evening I came across this little puzzle: The numbers 2,3,12,14,15,20 and 21 may be divided into two sets so that the product of the numbers in each set is equal. What is that product? I had […]

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6:08 PM | Geometric Series Sort Cards

Two sets of sort cards based on geometric series (in the new GCSE Higher Spec) Geometric Series Sort Cards