C

1. First we discussed the engineering design process with the students. We went through each step and wrote it on the board so we could refer to it during the rest of the lesson.

2. Then we discussed sturdy shapes. We made a square and a triangle out of beams and friction pegs beforehand to show how squares and rectangles are not sturdy shapes and how triangles are the most sturdy shape they can build with. Walked around the classroom and allowed each child to press down on a square and triangle shape.  We gave them a worksheet to draw sturdy shapes.

3.  Then we gave them a worksheet for building a tower.  The worksheet had each of the engineering design process steps on it.  Had to work hard to get the students to go through the brainstorm step. Left space on the worksheet for the kids to draw their tower design.

4. The criteria for the tower were explained to the children and written on the board.  Our criteria were (1) four inches tall, (2) support a book, (3) use four differnt lego peices.  We didn't stress the third criteria enough because were working harder on getting the kids to understand the use of sturdy shapes