A blog about teaching and learning in a maths classroom.

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Dates as Operations 2017

Wednesday, 28 December 2016 | 0 Comments

Like most teachers I write the date at the top of the whiteboard each day. As an extra point of interest, in 2016 I endeavoured to write a number sentence using the digits of the date, in order, underneath the date.

For example:
7/4/16        7 - √4 = -1 + 6
27/5/16        2 + 7 - 5 = √16
(Date written as dd/mm/yy)

  • Example of data as operation

I didn't specifically refer to the sentence, nor make it an activity in class. A senior student in one class made a point of completing the number sentence if I hadn't. Another student in my roll class regularly pointed out if I had not written a sentence for the day.

In 2016 I had some help completing a list of sentences.

If you'd like to contribute to a list for 2017 (or just use the list) visit this Google Sheet:

Dates as Operations 2017

For 2017, I have columns for two formats of the date dd/mm/yy and dd/mm/yyyy.

Data values vs scores

Sunday, 30 October 2016 | 0 Comments

Note for self really,

In the new NSW Syllabus for Mathematics K-10 what used to be referred to as scores when analysing data are now called data values.

So the definition of mean is written as

$$\bar{x}=\frac{\text{sum of data values}}{\text{number of data values}}$$


Post it Pythagoras

Saturday, 15 October 2016 | 1 Comment

Inspried by this, Pythagoras in 2 minutes.

I used Post-It notes to demonstrate Pythagoras' Theorem to a class.

Example of post-it Pythagoras

There's something nice and tangible about this simple demonstration.

I turned the idea into a animation:

Dice - MathsStarters

Saturday, 08 October 2016 | 0 Comments

I've updated the electronic dice on MathsStarters. Includes ready to go Multo and Addo cards.
Variations of dice include two six-sided dice, two ten-sided dice or two custom dice (0 to 20) - the dice can show multiplication or addition and answers.

MathsStarters Dice logo image

Bingo: Fractions, decimals and percentages

Tuesday, 09 February 2016 | 0 Comments

I've added an additional game under the Fractions category on MathsStarters Bingo:

Converting fractions, decimals and percentages

This game focusses on the conversion between the common fractions and their equivalents decimals and percentages. The game is limited to fractions with a denominator of 2, 3, 4, 5, 8 and 10.

Screenshot of MathsStarters Bingo

If you're not sure how to use this Bingo game, have a look at this earlier post.

Continue to all entries from February 2016

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Simon Job — eleventh year of teaching maths in a public high school in Western Sydney, Australia.
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