# Welcome to Lessons!

We are currently working on this endeavor. Lessons will not be posted until they have been beta tested with real students. Coming in Fall 2015.

Watching students learn and use TinkerCad within a few minutes, I feel further compelled for math and science teachers too (not just technology and art) teachers guide students through awesome projects. My goal is for teachers to work together on grade level appropriate projects so that students can learn. These just happen to be the 3D printing ones.

I’ve been to several national conferences now, with an eye in what schools are doing with 3D printing. I’ve seen the lessons where someone refers to “oh yes, and the mathematics is in the statistics gathered about amount of filament used and how high the rocket went” or “there’s geometry in looking at the shapes that went into this”. In short, it seemed like the mathematics was an afterthought. Coming in Fall 2015 will be lessons where the content drives the activity in mathematics and science.

A cursory glance at the middle grades mathematics content standards, it seemed fundamental that lessons addressing these standards would easily and have the potential to effectively use 3D printing:

2. Find the volume of a right rectangular prism with fractional edge lengths by packing it with unit cubes of the appropriate unit fraction edge lengths, and show that the volume is the same as would be found by multiplying the edge lengths of the prism. Apply the formulas V = l w h and V = b h to find volumes of right rectangular prisms with fractional edge lengths in the context of solving real-world and mathematical problems.

4. Represent three-dimensional figures using nets made up of rectangles and triangles, and use the nets to find the surface area of these figures. Apply these techniques in the context of solving real-world and mathematical problems.

2. Draw (freehand, with ruler and protractor, and with technology) geometric shapes with given conditions. Focus on constructing triangles from three measures of angles or sides, noticing when the conditions determine a unique triangle, more than one triangle, or no triangle.

3. Describe the two-dimensional figures that result from slicing three dimensional figures, as in plane sections of right rectangular prisms and right rectangular pyramids.

6. Solve real-world and mathematical problems involving area, volume and surface area of two- and three-dimensional objects composed of triangles, quadrilaterals, polygons, cubes, and right prisms.