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# Author Archives: toomai

## Shadblow Leaf Ecology

Here are some shadblow (Amelanchier canadensis) or serviceberry leaves that I collected from my yard this past Fall. Their tattered appearance speaks of the heavy use that the local ecology has made of them. Not only did they provide sugars … Continue reading

## Dyslexic Mathematician

This is part of a cluster of posts about dyslexia and ADHD. I have two learning “disabilities” (“learning differences” is a more politically correct, and more accurate term): dyslexia, and ADHD. Some people have been surprised to learn this. I … Continue reading

Posted in mathematical mind
Tagged algebra, dyslexia, geometry, learning disabilities, math, mathematician, mathematics, school
10 Comments

## Fruit in its Season

After a brief walk around the back-yard woodlot yesterday, here’s what ended up in my pocket.

## Plants without photosynthesis

Here’s something truly amazing that sprouted recently in my backyard. They are plants called Indian pipe, or ghost plant, or corpse plant. The Latin name is Monotropa uniflora. It has no green to it because it has no chlorophyll! No … Continue reading

## Parabolas III

Our next parabola video. All parabolas are the same shape, just different sizes!

Video
April 7, 2014
Tagged geomoetry, kids, math, mathematics, maths, parabola, parabolas
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## Parabolas II

In this second installment we multiply with parabolas!

Video
March 31, 2014
Tagged arithmetic, fun, geometry, kids, math, mathematics, maths, multiplication, parabola, parabolas
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## Parabolas I

My kids and I are working on a series of videos about parabolas. Here’s the first installment.

## Silver Maple Leaf Ecology

More wintry weather for us tonight and tomorrow. While we wait for new spring leaves, here are some more leaves from my yard last fall. 1. Tar spot looks like tar on the leaf, but is caused by a fungus, … Continue reading

## Abby’s Puzzles

My ten-year-old daughter asked me for help doing a mathematical STEM-fair project. We had a lot of funny doing the project together. Here is a brief description of what we did. We decided on the following question: “How many decominoes … Continue reading

Posted in computers
Tagged elementary education, kids, math, mathematics, pentominoes, polyominoes, programming, puzzles, Python, recreational math, STEM, STEM fair, tiling
11 Comments