## Chlamydia and Gonorrhea: infertility risks

Most people have probably heard of chlamydia and gonorrhea.  They are both bacterial STDs.  Since neither is life-threatening (as far as I’ve ever heard), they don’t get as much attention as AIDS or syphilis. A risk with both chlamydia and gonorrhea …

## Homeostasis, negative feedback, and thyroxin

Tutoring biology, the concept of negative feedback is important to explain.  Negative feedback is used by all organisms to maintain their living state.  You also use it while driving your car. More or less, the body needs all its processes to …

## Cell efficiency

When you tutor Biology 12, one topic that comes up is cell efficiency.  It’s a bit tricky for some people, because it involves some math. Putting it simply, imagine a cell is a sphere.  Its volume is what it needs …

## Conservation of momentum

Every year, the physics tutor fields a few questions on conservation of momentum.  It’s an interesting phenomenon because you can use it to explain some familiar, everyday situations. Momentum is mass times velocity.  Something that is 50 kg, traveling at …

## Does 0.33333….. really equal 1/3?

Hello.  What rain yesterday, here in Campbell River!  Well, we sure needed it.  It’s nice to have more seasonal temperatures after the oven that was last week. A math tutor often encounters the topic of converting decimals to fractions.  Terminating …

## Distance vs Displacement: Scalar vs Vector

When you tutor physics, a concept that soon comes up is scalar vs vector.  It’s not something most people ever think much about, but the difference is very important – especially in Science 10 and Physics 11. For example:  distance is …

## The double ‘l’ controversy

The other day my wife Diane got on my case about my spelling of “canceled”: Diane:  You spelled canceled wrong.  It only has one l.  There should be two. Jack:    You can spell it either way. Diane:  I’ve been a …

## Exponential Growth

Good morning from Jack, your tutor from Campbell River.  It’s brilliantly sunny here, with a high of 27 (or 81 F) expected.  This kind of weather can be so hard for kids just returning to school. The people entering math 12 …

## Algebra: basic

When you tutor math, you see various approaches to algebra.  Here’s my interpretation: 1)  Decide which side you want “x” (or whatever variable you have). 2)  Get all the x terms to that side, and all the numbers to the …

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## School Supplies: A tutor’s point of view

Last year, listening to French radio, I heard a surprising report:  school supply shopping is the second most stressful occasion for a great many parents, second only to Christmas shopping. If that’s true, it doesn’t need to be.  What’s more, I can explain why: 1) …