Curated OER
State Your Position
Middle schoolers practice using a global positioning system. They discuss the use of celestial objects as navigation points and its problems. They list the advantages and disadvantages of GPS as well.
Curated OER
PROJECTILE MOTION
Students measure muzzle velocity, and predict range of a projectile device. In this motion lesson students complete a lab and explain the outcomes of their experiments.
Khan Academy
Khan Academy: Add and Subtract Polynomials: Find the Error
Choose the step where an error was made in adding or subtracting polynomials. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.
Science Education Resource Center at Carleton College
Serc: Mineral Density: Teaching Accuracy, Slope, and Percent Error
Students explore the meaning of density and use their math skills to graph mass/volume data, write an equation for a line, and interpret the slope of the line. Students also find the density of two unknown mineral samples and use those...
Texas Instruments
Texas Instruments: Math Today for Ti: Is Leisure Time Really Shrinking
Students will to organize data from the USA TODAY Snapshot, "Is leisure time really shrinking?," into two scatter plots and determine the quadratic model for each scatter plot. Students will determine if these graphs intersect and learn...
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Centroid: Center of Gravity
At this site you will find am online discussion about the centroid of a triangle. The page begins with a discussion of observations leading to the centroid of a triangle. Dr. Math explains the correct findings as well as the errors made...
Instituto Latinoamericano de la Comunicacion Educativa
Red Escolar: Los Rompecabezas De Rosita
In Spanish. Build different things with different shapes, recognize patterns with shapes, and find the errors in Rosita's story.
Illustrative Mathematics
Illustrative Mathematics: A Rei Reasoning With Linear Inequalities
Young scholars are presented with a solution to an inequality and are asked to find two mathematical errors and explain why they are incorrect. Aligns with A-REI.B.3 and A-REI.A.1.
University of Cambridge
University of Cambridge: Nrich: Spelling Circle
On this one page website use trial and error to find the words hidden in the spelling circles. Check your solution right at the website.
University of Cambridge
University of Cambridge: Nrich: Number Juggle
Use those problem solving skills to find a solution to this triangle problem. When you have your solution you can check it right on this one page website.