In this third lesson, students learn about steam bending. They will "test bend" kabob skewers, learn the science of steam bending and build a bending form to put the characteristic curve in their back scratcher blank.
Lesson 4 has students forming and finishing their bent-wood back scratchers and completing this PBL project. This series of lessons introduced students to differing tree species, grain orientation and steam bending.
In this second lesson, students are given several samples of wood. The students' goal is to identify the species of wood blanks they're working with and recognize the different grain patterns that influence wood strength.
Students build a bent-wood back scratcher in this lesson series. There are four lessons in this PBL group. Students will learn that not all woods are suitable for bending. In this lesson, students learn of different tree species and become familiar with woods used in woodworking, and learn which woods make suitable back scratchers. Depending …