Pi Day 2019

Celebrated globally on March 14 (3/14), Pi Day is an annual opportunity for Maths enthusiasts to recite the infinite digits of Pi, talk to their friends about Maths, and to eat pie. At Rehoboth, the Maths Learning Area celebrate Pi Day by running a hands-on activity for students in Years 7-10.

This year’s Pi Day activity saw the students calculating the best buy of a number of shopping items using unit pricing. Items such as Coca-Cola (cans, bottle, glass), sugar (2kg, sugar cubes, sugar sticks), chocolate (share packets, block chocolate, mini Easter eggs, Easter bunnies, giant Easter eggs) were used. Students also worked out the cost per serve by comparing cereals (Wheatbix, Coco Pops, Rice Bubbles, Nutrigrain) and Hyrdalyte per dosage (icy poles, tablet, sachet, liquid).

Each year group was given time to select a number of items to work out which was the -best value and which was the worst values.

They were quite surprised to find that it was not always the cheapest to buy in bulk.

ItemCostUnit Price
Quilton Double Length 8pk x 360 sheets (2880 sheets)$8.50$0.30 per 100 sheets
Quilton 8pk x 180 sheets (1440 sheets)$3.50$0.24 per 100 sheets (best value)
Quilton 24pk x 180 sheets (4320 sheets)$12.00$0.28 per 100 sheets
Quilton Triple Length 6pk x 540 sheets (3240 sheets)$10.50$0.32 per 100 sheets (worst value)

The students also discovered that travel size, although more convenient, was often much more expensive. They also discovered they would get a lot more chocolate if they asked their parents to buy them the share packets of chocolate rather than an egg for Easter.

It was great to the students get involved and see many of them attempting some of the more difficult problems of comparing items that were not exactly the same, such as popcorn kernels and popped popcorn, or cordials of different concentrations. The students worked well in groups to help one another solve any problems they faced.

A big thanks goes to the Maths staff (Mr Eikleboom, Mr Peletier, Mrs van Wyk and Mr Vasquez) for organising the activities as well as to all of the students who took part on the day and made the activities what they were.

Marble Runs Make Maths Fun

The Year 5 class was given a Maths task to create a Marble Run. The criteria was straightforward, but all needed several particular angles included in the design. Students worked together in pairs on the design phase. Pondering over the endless possibilities as to where their marble could go, they all settled on a plan and collected resources to achieve their goal.

The students then set out on the most important part of an activity – the planning!

Initial plans were thoroughly thought through and problems were identified and changed during this stage. We drew our plans down on big sheets of paper and discussed them with the teacher and others around us. We thought about the materials we were going to use and then gave Ms V our lists of supplies. We also set about collecting things from home to make our Marble Runs even more awesome.

The first building session was clearly a lot of fun! (albeit a bit messy). The second and third sessions didn’t get any tidier. It looked like the class had been attacked by cardboard. We all had different approaches to the building and attachment of things to our boards. Some of us realised that we needed stronger supports as bits fell off at times. This was a little frustrating, but excellent for our problem-solving skills.

All of us achieved our goal of having our marbles run through with very few problems. After we completed our tasks we were able to time our marble runs.

Marble Runs make Maths fun!

Pi Day and Paper Chains

Today, 14 March, the College – and particularly the Mathematics Department – celebrated International Pi Day.

This year saw the Year 7-10s take part in a couple of different activities over the course of the day, providing an opportunity to use their maths outside the regular classroom. The aim of the activities is for all students to be able to participate fully, and as such, they are not mathematical intensive activities. The focus is more on developing students problem-solving and teamwork skills as well as having some fun together.

This year the Year 9 and 10s used their artistic flair to create mandalas – round symmetrical designs based around a series of circles and patterns, as complicated as each student desired. Interestingly, the most challenging thing for students was working out how to use a compass to draw neat and round circles!

It was great to see students relaxing and talking together while working on their masterpieces, and might I just say there are some talented artists at the College.

The Year 7-8s took part in some (mostly) friendly competition in creating paper chains.

Sounds simple I hear you say! Well it wasn’t quite that simple. The paper chains represented the number Pi (3.14159…) with each number being a different colour and length – something the students needed to work out. It was great to see the different approaches taken by each group, some more effective than others.

In the end some groups made some quite impressive and long chains, how long exactly rather dependent on the degree of teamwork. Well done to Tyndale who won the longest chain for both the Year 7s and Year 8s.

A big thanks goes to Miss Smoker for organising the activities as well as to all of the students who took part on the day and made the activities what they were.

Hands-on 3D Maths Activities with Year 3/4

Nothing brings a Maths lesson to life more than when you get to try out some things with your hands. Recently, the Year 3/4 class did just that as they investigated the beauty, fun and complexity of 3D shapes!

“In class, we have been learning about different 3D objects. We did 4 different activities about making and drawing 3D objects. It was a lot of fun and I enjoyed it” – Isaac

“Cindy and I made a cube with pipe cleaners and straws. We cut straws and slid them on the pipe cleaner and twisted it into a 3D cube. It was fun. Jacob and Sarai made a pyramid too” – Claris

“The activity I liked the best was drawing different types of 3D prisms, cylinders and a cone. I really enjoy drawing” – Owen

“I enjoyed drawing 3D shapes and building 3D objects because it was sort of challenging and because it was a creative Maths lesson. Did you know that two square-based pyramids joined together make an octahedron?” – Tim

“I made a pentagonal prism and another object that was a cube with a triangular prism joined on” – Wesley

“My favourite thing about 3D shapes was when we made the cube bubble wand. It made an hour glass shape when all 6 sides were covered with bubble mixture. When we blew the bubbles, it didn’t make cube bubbles, but sphere bubbles. It was awesome!” – Shem

“I learnt about 3D objects and how to draw and make them” – Zara

“I learnt that 3D shapes are obviously not flat. We made 3D shapes and mixed them with a bubble mixture and inside there was a cube. It was really fun!” – Isabella

“Isaac and I made a bubble cube out of straws and pipe cleaners. It was so cool and I made a huge bubble. Shem and Catherine blew a bubble in my face – it was hilarious! I learnt how to draw a 3D shape called a prism” – Valerie

“When we made objects, I made a cube with a pyramid on top; it looked like a house” – Joyce

“I chose a card and made the model in the picture out of connecting cubes. It was a bit tricky” – Chris

“It was fun making 3D objects. I made 2 pentagonal prisms joined together” – Catherine

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