Biltmore sticks

The math and social studies classes got together for a tree unit to learn about the old Maine logging industry. Kids built Biltmore sticks (a crude tool for measuring diameters, heights and lumber potential of trees). Above, a Biltmore stick is being used on a 11 inch diameter bucket for practice.

Mr. Favreau kicked off the unit with some background information.

Kids had to show they were expert measurers and be able to use the tick mark formulas correctly before being able to build their Biltmore sticks. The formulas were applications of trig ratios and proportions. Above is one of the programs that allowed kids to demonstrate this expertise.

Above are kids creating their Biltmore sticks.

Afterward, kids went outside with their Biltmore sticks during social studies class to measure 7 trees selected by Mr. Favreau. Kids went out a second time in math class to measure the same 7 trees with more modern measuring tools (clinometers and diameter tape, both of which were built by students). Finally, kids did an analysis to see how accurate the Biltmore sticks were.