## Estimation Challenges!

On Monday 4TJ explored some estimation challenges during their maths sessions.

We began by exploring ‘how many’… How many balls in a cup? How many students at school? How many people in the crows? We focused on our reasoning – explaining our mathematical thinking.

Then things got really challenging. Students had to estimate how many 100s and 1000s on a humongous freckle! Some wonderful strategies were used. This included breaking up the big freckle into parts and estimating how many 100s and 1000s in each section, using the whiteboard or grids in maths books. Some students even estimated the surface area of the big freckle using pi!

This was followed by the tissue estimation challenge, where students had to explore how many tissue boxes would fit into our classroom. Students used practical strategies, like counting out the number of tissue boxes across the three dimensions of the room and others measured the room and compared this with the tissue box measurements.

All in all, some great problem solving happening in 4TJ – particularly with tricky problems like these with no precise answers in sight!

## Sleep Talk

On Wednesday Grades 4T and 4J were lucky enough to have parent expert Andrew Perkins, a sleep scientist, come and speak to them. The students – and teachers – were fascinated by Andrew’s talk. He discussed why we sleep, how sleep works and the sleep patterns of different animals. He also wired up Ivy to a sleep recording device, to show how brain waves and breathing patterns are recorded and analysed so, as a sleep scientist, he can help people who have sleep problems. Thanks for coming in and sharing with us Andrew!

## 3/4 Estimation Experts!

The Grade 3/4s cleaned up today, winning ALL four prizes from the Family Maths Night!

Well done Kate, Indi, Izzy and Ella for the most accurate estimates from the Guestimation Station, which included the size of a watermelon, the number of froot loops in a jar, the length of a ribbon and the age of all the teachers from the maths team!

## Family Maths Night

Thanks to the Grade 3 and 4 families who came along to our first Bell Primary Family Maths Night on Wednesday! What a great opportunity it was to share some of the maths learning from our classrooms with families. We hope you had fun – the teachers who were there definitely enjoyed sharing our love of maths!

For those who missed out (or those who were there but want to try some of the games again), instructions for all the games played on the night can be found at this dedicated website: bit.ly/bellfmn

On this website there is a link to give feedback about the event. We’d love to hear from those who attended on the night.

## Exploring angles in Grade 4

Today 4J and 4T explored different angles using technology (ozobots) and manipulatives (pipe cleaners). The students showed an excellent understanding of different types of angles and had fun in the process!

## Pot of Gold Maths Game with Grade 1s

This week, Grade 4T joined 1B for a buddy maths session. Students learned a new game called ‘Pot of Gold’. The game enabled students to practise their skills of estimating and subitising, as well as explore probability with 20 sided dice! The Grade 4s enjoyed being leaders during the sessions and supporting the Grade 1s to develop their maths skills.

## Book Week – Grades 4 and 1 working together

The Grade 4s had a wonderful afternoon working alongside the Grade 1s as part of our book week celebration. We read ‘The Book Week Monster’ and then students worked in pairs to create their own book week costume design.

## Sneak Peek of Grade 4 Films

Check out trailers for a couple of the films that will be shown next Thursday at the Grade 4 – and 3/4B – Film Festival (3pm-4.30pm in the Grade 4 classrooms).

## Grade 4 (and 3/4) Film Festival – Next Thursday

Families of Grade 4s and 3/4B should have received invitations last week about the upcoming film festival.

If you didn’t, family members are invited to attend the festival next Thursday 1st August between 3pm and 4.30pm in the Grade 4 classrooms.

Check out some of the posters for films premiering at the festival:

## Skyscraper Puzzles

Today 4T and 3/4B teamed up to work on Skyscraper Puzzles. A bit like a 3D sudoku, students had to use spatial reasoning and teamwork to solve these challenging problems. Some wonderful persistence and problem solving on display!

If you’re interested in finding out more about the puzzles or trying these at home, the templates and explanation can be found here: https://buildingmathematicians.wordpress.com/2017/03/14/skyscraper-templates/

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