# Plus.maths.org

Lower Secondary Page Current When a secret agent wants to send a message, they write it in code so their enemies can't read it. Codebreakers need to develop mathematical skills like working backwards, being systematic, and ruling out possibilities in order to crack enemy codes and save the day. These problems will give you the chance to train your brain in order to become a better code cracker!

Foldables/Study Guides Lose a foldable? All foldables & study guides that we have made in class are available below. If you need help filling in the blanks, please see the completed foldable or study guide in the classroom. Remember, many of these files were copied back-to-back, so a two-page file is the front and back of the foldable. 6th Grade Adding and Subtracting Fractions and Mixed Numbers (PDF 11 KB)Four-door foldable for operations with fractions. 6th Grade Multiplying and Dividing Fractions and Mixed Numbers (PDF 12 KB)Four-door foldable for operations with fractions. Search Advanced Data Grapher The Advanced Data Grapher can be used to analyze data with box plots, bubble graphs, scatterplots, histograms, and stem-and-leaf plots. Algebra Tiles

Earth - Your life on earth Explore BBC Earth's unique interactive, personalised just to you. Find out how, since the date of your birth, your life has progressed; including how many times your heart has beaten, and how far you have travelled through space. Investigate how the world around you has changed since you've been alive; from the amount the sea has risen, and the tectonic plates have moved, to the number of earthquakes and volcanoes that have erupted. Grasp the impact we've had on the planet in your lifetime; from how much fuel and food we've used to the species we've discovered and endangered. And see how the BBC was there with you, capturing some of the most amazing wonders of the natural world. Explore, enjoy, and share with your friends either the whole page, or your favourite insights.

Quick Guide to the Common Core: Key Common Core Expectations Explained - Mathematics - Vander Ark on Innovation Guest blog by Kathy Kellman, executive editor of mathematics at Curriculum Associates Note: This is part two of a two-part series. Last week, my colleague Adam Berkin wrote the first part in this series, " Quick Guide to the Common Core: Key Common Core Expectations Explained " for the English Language Arts standards. A lot of people (including some educators) have a lot of anxiety about math: How do we teach it? Describing Nature With Math share Inquiry: AN OCCASIONAL COLUMN How do scientists use mathematics to define reality? And why? By Peter Tyson Posted 11.10.11 NOVA