Category Archives: Life in General

New Internet Math Reference Pages

The Internet boasts a wide-ranging assortment of math websites, and for years I maintained (or mostly neglected) a huge page of reference links. This spring I’ve been working on the paperback edition of my book‌—‌with its appendix of favorite books and internet sites‌—‌and I decided to revise my blog links to match.

Blogging while we watch the tide come in. :)
Blogging while we watch the tide come in.

So this week, I’m in Jeju, South Korea, visiting my daughter who teaches English there. In between seeing touristy sites and gorging ourselves on amazingly delicious food, she took me to a beautiful coffee shop that overlooks the beach in Aewol.

Great place to work on my blog!

The long monster list morphed into eight topical pages. I hope you find something useful.

Playing tourist with two of my daughters at Halla Arboretum.
Playing tourist with two of my daughters at Halla Arboretum.

I will try to keep these pages up to date, but the Internet is volatile. If you find a broken link, you can search for the website by name or enter the defunct URL into the Internet Wayback Machine at Archive.org.

Changing of the guard at Old City Hall, Jeju-si.
Changing of the guard at Old City Hall, Jeju-si.

And if you know of a fantastic website I’ve missed, please send me an email (LetsPlayMath@gmail.com, or use the comment form on my “About” page). I appreciate your help.


Feature photo above by Fractal Ken via Flickr (CC BY 2.0). Korea photos ©2015 Denise Gaskins, all rights reserved. For more math resource suggestions, check out my Math with Living Books pages. They’re not finished yet, but I’ll be working on them next.


Tabletop Academy PressGet monthly math tips and activity ideas, and be the first to hear about new books, revisions, and sales or other promotions. Sign up for my Tabletop Academy Press Updates email list.


New Fantasy Novel by Homeschooled Teen Author

Hunted600After months of editing, formatting, proofreading, sweat, and tears:

Teresa Gaskins’s new ebook Hunted: The Riddled Stone ~ Book Two is available now at Amazon. The paperback should follow within the next couple days, and the other online retailers will come along whenever their automated systems get caught up.

You can download the first five chapters here:

To celebrate the release of Hunted, the ebook version of Banished‌—‌the first book in the Riddled Stone series‌—‌will be on sale for 99 cents for the next few weeks.


Tabletop Academy PressGet monthly math tips and activity ideas, and be the first to hear about new books, revisions, and sales or other promotions. Sign up for my Tabletop Academy Press Updates email list.


Playful Math Snacks for May 2015

Tabletop Academy Press UpdatesThe May “Let’s Play Math” newsletter went out Monday morning to everyone who signed up for Tabletop Academy Press math updates. This month’s issue focuses on math games, from Rosie’s Princess in the Dungeon to Jim Pai’s Trig & Logarithm War. What fun!

If you’re not on the mailing list, you can still join in the play:

And remember: Newsletter subscribers are always the first to hear about new books, revisions, and sales or other promotions.

A Preview

Math Snack: Two Math Games
Playful, no-preparation math activities for all ages

Math games pump up mental muscle, reduce the fear of failure, and develop a positive attitude toward mathematics. Through playful interaction, games strengthen a child’s intuitive understanding of numbers and build problem-solving strategies. Mastering a math game can be hard work, but kids do it willingly because it is fun.

The easiest no-prep strategy game for all ages is the finger game Chopsticks. You don’t need any equipment, so it’s a great game to keep in mind for when you and your kids are stuck in a line or waiting room. Math concepts: counting up to five, thinking ahead.

And one of my all-time favorite games is…


Feature photo at top of post by marcello (CC BY 2.0) via Flickr.


Tabletop Academy PressGet monthly math tips and activity ideas, and be the first to hear about new books, revisions, and sales or other promotions. Sign up for my Tabletop Academy Press Updates email list.


They’re Here! Math You Can Play Weekend Sale

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: US$2.99 per book, now through Monday.

Math Your Kids WANT To Do

Are you tired of flashcards and repetitive worksheets? Now your children can practice their math skills by playing games.

Math games pump up mental muscle, reduce the fear of failure, and develop a positive attitude toward mathematics. Through playful interaction, games strengthen a child’s intuitive understanding of numbers and build problem-solving strategies. Mastering a math game can be hard work, but kids do it willingly because it is fun.

Counting & Number Bonds: Math Games for Early Learners, Preschool to 2nd Grade

Counting-Games

Counting & Number Bonds features 21 kid-tested games, offering a variety of challenges for preschool and early-elementary learners. Young children can play with counting and number recognition while they learn the basic principle of good sportsmanship, to respond gracefully whether they win or lose. Older students will explore place value, build number sense, and begin practicing the math facts.

Buy now at:

Addition & Subtraction: Number Games for Elementary Students, Kindergarten to 4th Grade

Addition-Games600x800

Addition & Subtraction features 22 kid-tested games, offering a variety of challenges for elementary-age students. Children will strengthen their understanding of numbers and develop mental flexibility by playing with addition and subtraction, from the basic number facts to numbers in the hundreds and beyond. Logic games build strategic thinking skills, and dice games give students hands-on experience with probability.

Buy now at:

Don’t Have a Kindle?

You don’t need a Kindle device to read Amazon ebooks. Click here to download the Kindle program for your computer, phone, or tablet.

For those of you who prefer to buy ebooks from iTunes, Barnes & Noble, Kobo, etc.‌—‌those versions are coming soon! The epub book format takes a bit more work, but I’m hoping for time to finish it up within a week or so.

Paperback editions are also in the works.


Featured photo above by Richard Riley via Flickr (CC BY 2.0).


Tabletop Academy PressGet monthly math tips and activity ideas, and be the first to hear about new books, revisions, and sales or other promotions. Sign up for my Tabletop Academy Press Updates email list.


Playful Math Snacks for April 2015

AprilMathCalendarFeature photo above by Nicolas Raymond (CC BY 3.0).

The April “Let’s Play Math” newsletter went out Monday morning to everyone who signed up for Tabletop Academy Press math updates. If you’re not on the mailing list, you can still join in the fun:

And remember: Newsletter subscribers are always the first to hear about new books, revisions, and sales or other promotions.

A Preview

Math Snack: Math Treks
Playful, no-preparation math activities for all ages

Created by Maria Droujkova, a Math Trek is a “virtual reality” game, played at the intersection between the real world and your imagination. Participants explore their towns and communities, start noticing mathematics everywhere, and grow their math eyes.

Math Treks are like scavenger hunts for math. Gather a group of friends, choose a topic, and go for a walk to see how much math you can find. Take pictures to share and compare. My math club families have enjoyed a Multiplication Trek (looking for things in groups and arrays) around our local library and a Symmetry Trek through the woods.

If you have time for a little preparation, Maria posted several Math Trek game sheets you can download and print. …


Tabletop Academy PressGet monthly math tips and activity ideas, and be the first to hear about new books, revisions, and sales or other promotions. Sign up for my Tabletop Academy Press Updates email list.


Playful Math Snacks: Why Pi?

Photo by KaCey97078 (CC BY 2.0) via Flickr.
Photo by KaCey97078 (CC BY 2.0) via Flickr.

Teachers and other math nerds are preparing to celebrate an epic Pi Day on 3/14/15. Unfortunately, the activities I see on teacher blogs and Pinterest don’t include much actual math. They stress the pi/pie wordplay or memorizing the digits.

With a bit of digging, however, I found a couple of projects that let you sink your metaphorical teeth into real mathematical meat. So I put those in the March “Let’s Play Math” newsletter, which went out this morning to everyone who signed up for Tabletop Academy Press math updates.

If you’re not on the mailing list, you can still join in the fun:

A Preview

Math Snack: Why Pi?

In math, symmetry is beautiful, and the most completely symmetric object in the (Euclidean) mathematical plane is the circle. No matter how you turn it, expand it, or shrink it, the circle remains essentially the same. Every circle you can imagine is the exact image of every other circle there is.

This is not true of other shapes. A rectangle may be short or tall. An ellipse may be fat or slim. A triangle may be squat, or stand up right, or lean off at a drunken angle. But circles are all the same, except for magnification. A circle three inches across is a perfect, point-for-point copy of a circle three miles across, or three millimeters…


Tabletop Academy PressGet monthly math tips and activity ideas, and be the first to hear about new books, revisions, and sales or other promotions. Sign up for my Tabletop Academy Press Updates email list.


Fun with the Impossible Penrose Triangle

I found this delightful animation today:

Ball-travels-around-impossible-triangle

The ball is traveling around a shape that can’t exist in our real world: the Penrose triangle. This illusion is the basis for some cool art, like Escher’s Waterfall. And I’m using it in my Math You Can Play books as a design on the back of my playing cards:

A-2-3deck

Want to Play Around with the Penrose Triangle?

Here’s a few links so you can try it for yourself:

Penrose Lego by Erik Johansson (CC BY 2.0)
Penrose Lego by Erik Johansson (CC BY 2.0)

Book Update

Addition-Games

I’ve sent the first two Math You Can Play books to a copy editor (she edits the text part), so my focus this month is on finishing the illustrations and downloadable game boards. And designing the book covers — I think I’ll call this latest iteration done.

If everything stays on schedule, both Counting & Number Bonds and Addition & Subtraction should be available by mid- to late-spring. Fingers crossed…


Tabletop Academy PressGet monthly math tips and activity ideas, and be the first to hear about new books, revisions, and sales or other promotions. Sign up for my Tabletop Academy Press Updates email list.