Showing posts from June, 2012

Some online measuring games

Recently I was updating the list of measuring-related online games & resources at my site. I found these resources (new to me) and thought you might enjoy them a:

The Ruler Game
Choose between whole inches, half-inches, quarters, eighths, or sixteenth parts of an inch to measure. Click on the given measurement on a ruler. Timed or not timed versions available.

Sal's Sub Shop
Customers order subs, and you need to cut them to the given measurements - sometimes in metric units, sometimes in inches.

Reading Scales
You can illustrate a variety of measuring devices, such as scales, measuring cup, thermometer, and speedometer, and how to read them. Generate examples using different scales on different devices at the press of a button.

An online activity about metric measuring units and how to read scales, measuring cup, and a ruler. Uses British spelling.…

Mathematics and scheduling of buses

Image courtesy of welshmackem

I found this article via Math Teachers at Play carnival... it talks about a new method of scheduling buses, which uses mathematics, namely Markov Chains.

I'm not personally familiar with Markov chains, but whenever mathematics solves a problem in real life, I find it fascinating!

The mathematical method "evens out" the headway (the spacing between buses) by holding each bus at the start of the route a specified amount of time. That avoids "bus bunching", and it also makes it where the bus drivers don't need to adhere to any schedule--reducing their stress.

The researcher John Bartholdi says

The trick is to hold the bus for an adjustable amount of time at one stop. We simply control how long they wait at the end of the route, and then we tell them, ‘drive comfortable with the traffic to the other end. Don’t worry about where you are. Just flow with the traffic.’
Read more: Markov Chains avoid buses arriving in threes
Sounds c…

More about Area - free worksheet for grade 3

Here's a little sample of what is keeping me so busy right now - third grade math, aligning things to the Common Core standards.

This is a complete lesson (4 pages) about area for grade 3 math. It's not the initial lesson - it assumes the student already knows how to find the area of a rectangle. (Sorry - there is no answer key at this time; it hasn't been made yet!)

The lesson (worksheets) is specifically about these two standards:


7.c. Use tiling to show in a concrete case that the area of a rectangle with whole-number side lengths a and b + c is the sum of a × b and a × c. Use area models to represent the distributive property in mathematical reasoning.

 d. Recognize area as additive. Find areas of rectilinear figures by decomposing them into non-overlapping rectangles and adding the areas of the non-overlapping parts, applying this technique to solve real world problems.

Homeschool domination infographic

I realize these ideas are not new to us homeschoolers... but someone has put together a nice looking infographic about how much better homeschoolers fare than their public school counterparts. So, maybe you will enjoy it.

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