PBS
Pbs Teachers: Boats Afloat Experiment
Estimate how many pennies a flatboat made of aluminum foil will hold, then test your hypothesis.
Oswego City School District
Regents Exam Prep Center: Error in Measurement
What are the common errors made when students take measurements and how can they be avoided? A good deal of vocabulary associated with measurement errors is explained. Tips are provided for the student and the teacher in hopes of...
Khan Academy
Khan Academy: Estimate Mass (Grams and Kilograms)
Practice estimating the mass of real life objects using grams and kilograms. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Math Aids
Math Aids: Estimation Worksheets
Great resource to practice and strengthen math skills pertaining to estimation. Math worksheets are printable, may be customized, and include answer keys.