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Sterling Middle School Math
Things to ask your 7th grader
A question parents can ask their student to give them practice using math language to talk about the topic of the day
Sides of squares
What is the length of the side of a square whose area is 5? The square root of 5.
Tom Keeler
Mar 251 min read
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Triangles and degrees
How many degrees are in the three angles of a triangle? 180 How many degrees are in each of the angles of an equilateral triangle? 60 ...
Tom Keeler
Mar 251 min read
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When does a new number family start?
When counting by powers of ten, a new family starts every multiple of 3. 10^3 is the start of the thousands family, 10^6 is the start of...
Tom Keeler
Feb 261 min read
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One away from a perfect square
How much less is the product of two numbers that are one more and one less than a perfect square? For example, how much less is...
Tom Keeler
Feb 121 min read
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One square to the next n+n+1
After practicing the squares of the multiples of 10, 10x10, 20x20, etc., next look at the squares that are one bigger: 11x11, 21x21, etc....
Tom Keeler
Feb 111 min read
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Why not 10,000?
Ask your student how many perfect squares are less than 10,000. (note: 100*100 = 10,000, so 1 squared up to 99 squared must be less than...
Tom Keeler
Feb 101 min read
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solid vs hollow dot
When drawing an inequality, what is the difference between the hollow and a solid dot?
Tom Keeler
Feb 51 min read
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The hungry box of candy
Ask your 7th grader to tell you a story in which the value of a variable is negative. The story we were telling today is of the box of...
Tom Keeler
Jan 301 min read
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The best first move
What is the best first move with the equation 10-4x = 2x+3 ? Many students will choose to subtract 2x from both sides. But then you...
Tom Keeler
Jan 291 min read
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One half of x
If half of x equals 10, what does x equal? 20 If one third of x equals 10, what does x equal? 30 If two thirds of x equals 10, what does...
Tom Keeler
Jan 281 min read
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Price per piece and delivery charge from a table
7th graders started working on this recently. 8th graders began the year with this. The story is you order candy to be delivered. Candy...
Tom Keeler
Jan 231 min read
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Proportional vs Non-Proportional
When is something proportional? This is a little more complicated than it seems. I get paid $10/hr for babysitting. The amount of money...
Tom Keeler
Jan 161 min read
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The properties
7th graders are reviewing commutative and associative properties. Commutative property is that you can change the order of the terms...
Tom Keeler
Jan 141 min read
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Less than vs less than or equal to
Ask your 8th grader for an example of less than vs an example of less than or equal to. For example, if you give your child $5 to spend,...
Tom Keeler
Jan 141 min read
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7th or 8th: What is the difference between an expression and an equation?
Ask your 7th or 8th grader what the difference is between an expression and an equation. An example of an expression would be 8p + 4g...
Tom Keeler
Jan 71 min read
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7th: Negative times negative example
You notice that the temperature has been going down three degrees per hour. Currently the temperature is zero degrees. What calculation...
Tom Keeler
Dec 19, 20241 min read
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7th and 8th: Why is a negative times a negative a positive?
Ask your student why a negative number times a negative number equals a positive number. For example, why does -2 -5 = +10 ? 7th...
Tom Keeler
Dec 16, 20241 min read
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7th and 8th: 10% growth
Ask your 7th/8th grader what they multiply by to have 10% growth. An easy number to start with is 100. Then ask them what they would do...
Tom Keeler
Dec 13, 20241 min read
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7th: percent change
You run a campaign to increase the number of members in your club. You go from 100 members to 200 members. What was the percent...
Tom Keeler
Dec 12, 20241 min read
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7th: tricky problem
Yesterday we asked everyone to work on this problem: After some coaxing the students set up the ratio And they figure out that at 5%, if...
Tom Keeler
Dec 11, 20241 min read
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