# OnGo Supplemental Math Videos

February 7th, 2022

Grades 5 and up, with parental supervision

This website provides short instructional math videos that can be used to supplement math studies. The videos consist of a narrated lecture and animations that illustrate the concept being discussed. The videos are enabled for iPhone, iPod and iPad devices for portable, on-the-go learning.

When you get to the website you’ll see a menu of math videos that include topics such as:

• Triangular Numbers (Parts I, II & III) – Elementary explanation of triangular numbers, a general formula for the sum of an arithmetic progression, and a solution to the Recursive equation.

• Mathematical Induction (Parts I, II, & III) – Explains the Method of Mathematical Induction. Discussion of Francesco Maurolico, Pascal and John Wallis, plus Fermat’s Method of infinite descent, etc.

• Weaving Numbers – Explanation of Vedic multiplication or weaving multiplication. Includes Fibonacci’s sieve or lattice multiplication, and more.

• Dimension 2 – Explains how two numbers can describe the position of a point on a sphere, and how one can draw a picture of the Earth on a piece of paper.

• The Fourth Dimension – Mathematician Ludwig Schläfli discusses objects in the fourth dimension.

• Complex Numbers – Mathematician Adrien Douady explains the square root of negative numbers in simple terms.

• Pi – An explanation and illustration of the most famous mathematical constant.

The narrator on some of the videos speaks in a monotone voice with an accent, so we found it necessary to really pay attention to hear and understand the lectures. Fortunately, the animated illustrations help the viewer to maintain focus.

We couldn’t find “about” information on the site, so it’s not clear who is providing the info or why. Currently, there are no advertisements on the site, and all of the videos can be accessed for free, without registration.

This is a helpful resource for supplementing the study of various math concepts.

# Study Astronomy with Paper Plates

January 25th, 2022

Paper Plate Astronomy & Much More!

This is a novel approach to education — and so simple! Paper Plate Education is “an initiative to reduce complex notions to simple paper plate explanations.” That’s right, through the use of paper plates you can participate in a range of activities that introduce varying degrees of complex subjects in fun, interesting, hands-on, low-cost ways!

When you get to the site you will see a brief introduction and a menu of the latest projects contributed by educators. The Transit of Venus that took place in 2004 is featured and this site offers activities with paper plates to track Venus’ path across the sun, along with links to other resources you can access to learn about this event.

Once you scan the new items, look at the menu bar at the very top of your screen and click on “Activities.” A new screen opens with a menu of over 80 activities you can do with paper plates to learn a variety of subjects including:

• addition & multiplication (including Flash Plates!)
• make an alien platecraft
• measure altitude of celestial objects
• transpose musical notes
• make cosmic hats
• explore The Drinking Gourd
• illustrate the outcome of a particle colliding with an anti-particle
• explore circles
• make a model to explain moon phases and then make a moon mask
• make a music shaker
• P.E. with paper plates
• make a portable sundial
• and much, much more — including some activities that are done with other objects like potatoes and rice cereal treats!

When you have exhausted the activities go back to the Home page, and scroll down to “Background.” Click on it to check out the history of paper plate education — and learn about how scientists and others have used paper plates for centuries to demonstrate theories and complex principles.

This is really a great resource for homeschool families — bookmark it so you can return often!

# Math Worksheets at Your Fingertips

January 24th, 2022

Math-Drills.com

This ad-supported website offers thousands of free, printable math worksheets with answer keys to help students learn, practice, and master math.

When you get to the site you’ll see a welcome message. Click on “Math Worksheets” on the top left to access worksheets on:

• Multiplication Facts
• Subtraction
• Division
• Algebra
• Money Math
• Fractions
• Integers
• Powers of Ten
• Decimals
• Geometry
• Measurement
• and more!

Click on any topic and a new page opens with a menu of worksheet options. Click on a worksheet title and a new page opens where you can open in your browser or download to your computer and print out the worksheet to use offline.

You’ll also find flashcards, holiday-themed math worksheets, games, and more!

# Useful Math Tips & Tricks

December 6th, 2021

Curious and Useful Math

Grades 1 & up, with parental supervision

Oh, what fun you can have at this site. Here you will find all kinds of quick tricks for solving certain types of arithmetic problems.

For example:

Discover how to tell if you can divide a number evenly by 2, 3, 4… on up and by 15, 24, 33, and 36 too – just by looking at it!

Get all kinds of multiplication/squaring tips – and even tips for finding square roots by hand.

In addition to handy, dandy tips and tricks that make math easy without a calculator, you will find little math magic tricks to amaze your friends that you can do with birth dates, calendar dates, people’s ages, biblical numbers, etc.

Have fun!

# Explore Vedic Mathematics

October 25th, 2021

Grades 3 and up,with parental supervision

This commercial site provides information and free sample tutorials on Vedic Mathematics.

What’s “Vedic Mathematics”? As explained at the website:

“Vedic Mathematics is the name given to the ancient system of Indian Mathematics which was rediscovered from the Vedas between 1911 and 1918 by Sri Bharati Krsna Tirthaji (1884-1960). According to his research, all of mathematics is based on sixteen Sutras, or word-formulae… These formulae describe the way the mind naturally works and are therefore a great help in directing the student to the appropriate method of solution… The simplicity of Vedic Mathematics means that calculations can be carried out mentally (though the methods can also be written down).”

Words really don’t begin to describe this innovative way to solve math problems and mentally calculate answers to math equations. It almost makes learning math like learning fun magic tricks. When you get to the website, click on New to Vedic Mathematics, then “tutorials”, then Fun With Figures. Try the free sample tutorials that explain ways to find arithmetic solutions for:

• Multiplication
• Subtracting Fractions
• Finding Square Roots
• Division
• and more!

Read the instructions and apply the Vedic method to find the solutions to an array of sample problems. Your kids will enjoy experimenting!

For those who have never heard of or tried this method before, it will really set your mind to thinking about math differently.

If your kids struggle with mathematics the Vedic system may provide an alternative method that suits the way your child learns best. This site sells products that teach the Vedic system, but the sample tutorials are free. It also provides many links to other websites with articles, downloads, activities, and further resources for learning Vedic mathematics. We have not reviewed these other websites.

Just FYI, YouTube carries some free Vedic math tutorials. Just go to YouTube.com and enter “Vedic math tutorials” in the search engine. A menu of free instructional videos on the Vedic system pops up that you can explore on your own. We have not reviewed the YouTube presentations on Vedic math, so parents AS ALWAYS should preview the material and supervise use.

# Times Tables Learning & Games!

October 18th, 2021

Multiplication.com: Fact Navigator

This commercial website offers free lessons on how to learn the multiplication times tables from 0-9, through the use of mnemonic memory devices.

These learning tools help kids associate rhymes, stories, pictures and activities with arithmetic to make memorization easier.

The premise is to address the learning modalities of every student. Each lesson uses pictures for the visual learner, stories for the auditory learner and an activity for the kinesthetic learner who learns by moving, doing, and touching.

When you get to the website, choose from the multiplication facts shown to start off. Then check out the links at the top of the page:

• Games
• Learn
• Teachers
• Parents
• Auto-Scored Quizzes
• Resources

As we mentioned, this is a commercial website. The freebie is an introduction to their books, games, and other math resources available for purchase.