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Each day of the school year I present my students with an estimation challenge. I love helping my students improve both their number sense and problem solving skills. I'd like to share the estimation challenges with you and your students. Here's a handout for your students. Happy Estimating!

A great whiteboard game for teaching about number lines, decimals and place value. Work out what the number is along the number line. http://ictmagic.wikispaces.com/Maths

Measure and estimate angles with this nautical-themed site. http://ictmagic.wikispaces.com/Maths

"In this section, you will find some fun ways to learn about math. You can start out with Estimation of Length, Place Value and Weight and Capacity. If you want something more challenging, take a look at Line Symmetry, Patterns and Tangrams."

Number sense and student inquiry

This is a useful sport themed maths resource about measuring and estimating decimals, scales and place value. http://ictmagic.wikispaces.com/Maths

A useful maths resource where users estimate an angle and stop the line at the right point. http://ictmagic.wikispaces.com/Maths

In this lesson, students learn how to measure the area of the tire footprint on a car and to find air pressure using a tire gauge. Students then find the weight of the car using their fraction multiplication skills. Learning Objectives   Students will: Estimate weight of a large object Use a ruler and a tire gauge to take measurements Collect and record data Review square units of measure Calculate area by multiplying fractions Materials   Strips of poster board Ruler Tire gauge How Much Does a Car Weigh? Activity Sheet Computer with internet connection Car Instructional Plan In preparation for this lesson, place a car in a safe lcation for the students to measure the tire footprints and pressure. In case of bad weather, find a covered location. Be sure to measure the tire footprint and the pressure (in PSI) of each tire ahead of time, so that you will be able check the accuracy of students' measurements. Also, check the accuracy of your calculation by comparing to it to the weight of the car listed on the sticker inside the driver's door or in the vehicle manual. By the end of the day, data may change because air has leaked out of the tires while students were using the tire gauge. For safety, check the tires before driving home.

Fundamentals of Mathematics is a work text that covers the traditional topics studied in a modern prealgebra course, as well as topics of estimation, elementary analytic geometry, and introductory algebra. It is intended for students who (1) have had a previous course in prealgebra, (2) wish to meet the prerequisite of a higher level course such as elementary algebra, and (3) need to review fundamental mathematical concepts and techniques. NOTE: This collection is a work in progress, and the content has not yet been marked up in CNXML. You can download PDF copies of individual chapters in from their respective modules.

See real-time data on a host of topics important to daily life around the world!! * world population (e.g., births this year, deaths today, net population growth for today) * government and economics (daily government spending by category; computers sold) * society and media (new book titles published, money spent on video games, Google searches) * environment (forest loss, carbon dioxide emissions, current average temperature) * food (tons of food produced; people who died of hunger) * water (water consumed, people with no access to safe drinking water) * energy (solar energy striking Earth; oil pumped; oil, gas, and coal left) * health (deaths caused by alcohol, suicides, road traffic accident fatalities) Worldometers' algorithm takes the latest statistical data available from the United Nations (UN), the World Health Organization (WHO), the Food and Agriculture Organization (FAO), and other institutions, and then processes them together with its estimated progression to compute figures current up to the millisecond. Available in dozens of languages, this site is part of the Real Time Statistics Project. Read more about that here: http://www.realtimestatistics.org/

"The revolutionary calculator that shows the answer only when you also enter a suitable mental estimate." (I have no connection with this company or product.)