K-5 Math Teaching Resources

K-5 Math Teaching Resources offers a vast amount of resources for elementary math teachers. Activities are described within the site and also available for PDF download. The site was originally intended as a digital storage place for the creator’s resources used in consulting work and evolved into a place to share math resources with other teachers.

The site is simply organized, allowing for easy navigation and is aligned to the Common Core. The Table of Contents is displayed on the left side of the home page.  Content headings include Number (with a link to each Grade K – 5), Geometry (divided into K – 2 and 3 – 5 clusters), and Measurement/Data (divided into K – 2 and 3 – 5 clusters), Book Store (which contains ebooks by the site’s author as well as math resource books by other authors), Communicating Mathematically (which lists rhymes, journals, vocabulary, and projects), Classroom Organization (with games, centers, and other math resources),ECAM Centers (Early Childhood Assessment in Mathematics), Mental Math resources, and IWB Resources (Interactive White Board resources).


Be sure to look at other grade levels for activities that can be modified for your teaching situation. Also available on the site is extensive information about Math Journals (warning – their math journals are for sale on the site; however, information to make and use your own is free). Other topics include math games, centers, projects, mental math, and resources – including some for interactive whiteboards.

Scale of the Universe 2

Scale of the Universe 2 – “Explanation: What does the universe look like on small scales? On large scales? Humanity is discovering that the universe is a very different place on every proportion that has been explored. For example, so far as we know, every tiny proton is exactly the same, but every huge galaxy is different. On more familiar scales, a small glass table top to a human is a vast plane of strange smoothness to a dust mite — possibly speckled with cell boulders. Not all scale lengths are well explored — what happens to the smallest mist droplets you sneeze, for example, is a topic of active research — and possibly useful to know to help stop the spread of disease. The above interactive flash animation, a modern version of the classic video Powers of Ten, is a new window to many of the known scales of our universe. By moving the scroll bar across the bottom, you can explore a diversity of sizes, while clicking on different items will bring up descriptive information.”

Who is the creator?  It turns out that “Scale of the Universe 2” was created by Cary Huang, a 14-year-old ninth grader from Moraga, Calif., with technical help from his twin brother Michael.

Michael and Cary Huang (Cary is on right in blue T-shirt). Huang family photograph.

“My seventh grade science teacher showed us a size comparison video on cells, and I thought it was fascinating. I decided to make my own interactive version that included a much larger range of sizes,” said Cary in an email forwarded by his mother. “It was not a school project — just for fun. However, my science teacher loved it so much she showed [it] to the class! My brother, Michael, helped me put it on the internet.”

Cary said he worked on the project, on and off, for a year and a half, getting information from Wikipedia and astronomy books. It is now spreading virally online.

Click on objects in the animation for more information. Cary said he invites people to correct any errors they find. This is his second version, he said; the first had less information in it, and the graphics needed work.

“We’re not sure what we want to do after we finish school, although we’re both interested in computer programming and animation,” said Cary. “And astronomy is also cool!”

Asked if he thought there was a lesson to be learned from the project, Cary wrote, “I would like to say that humankind is a very small part of the universe we live in. There could be so much more out there, but we just don’t know it yet.”