How can you measure the height of a tree or telephone pole with only a short measuring tape?  It's not a problem when you start by measuring your shadow and your height to create a ratio to use with taller objects. Additional...

Middle schoolers use cross-multiplication to find the unknown respiration rate of an astronaut. In this multiplication lesson plan, students also use the same process to find missing values in proportions.

Pike fish pose a threat to native trout and catfish in lakes. Would you drain and poison a lake to get rid of the Pike fish? If the lake was drained and poisoned, then refilled and repopulated with trout and catfish, how would you...

Young scholars relate mathematics to braiding and knots.  In this braiding and knots lesson, students calculate the components for building braids. Young scholars share their braids investigations.

Students complete activities for multiplication practice. In this multiplication lesson, students stand in a circle and count in twos as they go around the circle. Students also count in fives using their fingers and watch an online clip...

Students examine human blood flow by comparing the pulse of athletes.  In this human body lesson, students discover the equation for finding the cardiac output from a human heart.  Students identify heart rates of accomplished...