# Author Archives: Mr De Palma

# Maths- investigating the area of circles

Students realised that by squaring the circle’s radius, the resulting square ‘fits’ in the circle less than 4 times. Which number that we have been working with is somewhere less than 4 times? Well Pi of course or 3.14. From here students deduced that the formula for working out the area of the circle itself is the raduis x radius x pi…or pi.r(squared). In deriving the formula themselves students understand the area of a circle much deeper and can now try an estimating strategy to see if they get around the same answer!

# STEM- engineering using maths skills.

# Science- free choice science experiments/ investigations

# Mathematics- using circles to design and make something….

**Groups and what they are making…**

Hayley, Atong, Marissa- designing and making a model car

Oceanne and Ruth- making a bike

Kaitlyn, Grace, Sienna- desiging and making a Wheel of furtune

Tony, Danny, Cameron- making a hamsten wheel

Nawaraj, Mohammad, Jacob, Cameron- making a car

Madi and lilli- wheelbarrow

# Lucas’ poem

# Numeracy- constructing our trundle wheels

Students have now used their understanding of pi, diameter of a circle and circumference to work out how to make a 1m long trundle wheel circle. Most groups have even devised a way to make the trundle wheel ‘click’ when it reaches 1 meter and surprisingly most wheels are pretty accurate- give or take a cm or 2 ðŸ™‚

# Maths/ numeracy- making a trundle wheel

Most students have found the relationship between a circles diameter and its circumference. Therefore they have calculated that a meter circumference would have a diameter of about 31.8cm (by dividing 100 by pi). Now its time to make the circle bit of the trundle wheel out of cardboard. here are some pics….

# Parent helpers needed spring fair

Hello parents!

if you are able to help out this Sunday at the Spring fair, kindly let us know.

Many thanks

Mr De Palma

# Mathematics- circles

Many students are noticing that the diameter ‘fits’ into the circumference of a circle 3 and a bit times. The challenge has been to work out what that ‘bit’ is as a ratio of the diameter.

Many students are getting around 3.14 which is Pi. Students are now expressing the relationship between the diameter and the circumference and pi with a formula so that they can begin constructing their trundle wheels.