## Featured resource

### Focus in High School Mathematics: Reasoning and Sense Making

Practical discussion of these key goals of mathematics curriculums.

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# More teaching ideas

## Braille

• Write a warning sign in Braille applicable for a person who is vision impaired; e.g., high step, steep incline, etc.

## International marine signal flags

• Sort flags according to their properties; e.g., symmetry, halves, quarters, etc.
• What smaller shapes can you find inside the flags? What shapes make up each flag?
• Why don’t they use colours other than red, yellow, blue, white and black?

## Dancing men cipher

• Integration – make up own version using symbols relevant to the topic/theme being studied; e.g., space.

## The Overland Telegraph line

• In the ‘olden days’, Morse code was only used in urgent situations, otherwise letters were written. Write down 3 urgent messages that could have been sent via Morse code.
• Write a story about a camping adventure that goes wrong. Make sure the solution to the problem in the story is written in Morse code.

## Pigpen

• Write spelling list of the week in pigpen cipher.
• Write a letter to a friend in code.

## Rail fence cipher

• Decipher a rail fence cipher
• Write a list of instructions for an activity in rail fence cipher; children will need to break the code to work out how or what to do in activity.

## Semaphore

• Additional uses of flags; e.g., show jumping.
• Play a simple game of Chinese whispers to show how a message has more chance of being messed up the more people you have involved. Play Chinese whispers using the flags.

## Sign language

• Read a repetitive book as a whole class. Each time one of the common words comes up, sign it instead of saying it.
• Learn some of the more common nursery rhymes in sign language.
• Play any floor/whole class game and instead of saying the person’s name, sign it.  “Hey _____.  Can you hear my name?” etc.

## More investigation ideas

• Look at systems for identifying animals on farms/stations; e.g., pig breeding uses an ear marking system where triangles are cut into pigs ears for particular numbers.
• Investigate tattoo symbols on dogs ears, or symbols/brands on horses.