Part of Unit: Abrasives
Lesson Plan Overview / Details
The lesson will cover the different types of sandpaper and their uses in woodworking
- Hook and grouping
- 5 Minutes
- How it's made video on making of sandpaer
- 10 Minutes
- Power point on Sandpaper
- 25 Minutes
California Career and Technical Education Standards
California Academic Content Standards (Reinforced)
Objectives and Goals
Student will be able to identify different types of sandpaper, the proper grit selection and how to sand for best finishing results
The teacher needs to have the following pieces of sandpaper and sandpaper samples available. The larger variety of samples the better for the students to see.
Wide belts from a surface sander if available, large belts from a stationary sander, small belts from hand belt sanders, small 5"-6" disks, large disks from stationary sanders. Drum sanders or spindle sander sleeves or any other sandpaper that is different from sheets goods.
You want to be sure that students do not get the idea that sandpaper is in 9x12 only.
Have sheets of sandpaper in the assorted grits 60, 80 120, 220. Emery paper, aluminum oxide, silicone carbide (wet dry paper) and garnet paper.
On the back of the sheets write either words in large print, or phrases. Precut the piece into quarters and hand them out when they come in
Activities in this Lesson
- Sandpaper scavenger hunt - Hooks / Set
When students walk in the room, hand each student a small piece of sand paper of different grits and different types. Full sheets will be cut into 4 pieces with a writing on the back. After they are seated have the students get up and move tables to group by sandpaper type. On the back of the full sheet write words or phrases that the students have to put together to be sure their group is the same type and grit of paper. They may not be able to tell exactly what they have but they will be able figure out that they have the same paper/grit.
- How it's made video - Lecture
Give the students a 1/2 sheet of paper with video questions on them for them to answer. Students in their groups will write all the names of the people with the same sandpaper, the type they got and the grit.
Attached are the questions for the video, it can be copied to get 2 per page or have students copy the questions on their own paper before the video starts. This will also help them remember the questions by writing them down so they can listen for the answers while they are watching the video
- Pre powerpoint - Lecture
Have students check their papers, did they see their sandpaper in the video? Does it really matter what type you use or how rough it is? Sandpaper can make or break all of the hard work you have put in on your project to this point. Show students a piece of finished material that has been sanded on one side and left untouched on the other. Flip the board over and show the other side with finish on it to show how all the imperfections, scratches and glue marks do not just go away with magic, they need to be sanded. Part of the board will have been rough sanded in various stages to show the progression of grits.
Sanding is the most important part of building a project. All of the hard work you do can be left to look horrible if you do not pepare the wood for final finish. This is only accomplished by sanding with the right sandpaper.
- Power Point on Sandpaper - Lecture
After students watch the video on how sand paper is made start the powerpoint. During the powerpoint you can start students out by looking at the sandpaper they have in their groups. Have them look at the piece they have to see that there are the 3 components that each piece is made up of.
Backing material, adhesive and abrasive(cutting) material
All pieces of sandpaper are made up of the same components - have as large a variety of sandpaper types. You should have large (bigger the better) small belts, large disks, and small disks, drums and spindles if available. Have a to show that sandpaper is not just for sanding but also as grip tape for boards.
Sandpaper is all about grit. What is grit? Grit is how sandpaper is measured. Teacher needs to have a small rock that is about 1" square. This would represent 1 grit sand paper.
Work through the sandpaper powerpoint and have students take notes. It is important to show students that no matter what the sanding is it will all be made of the the same basic components, each type has a specific use.
- sandpaper.ppt [ Download ] Sandpaper powerpoint with detailed notes for the teacher on what information to give the students when presenting the lesson
- Assessment Types:
All projects completed will have a percentage of the grade dedicated to sanding. Students will be instructed that they may not proceed to the finishing process until the teacher has approved the final sanding. During the sanding process on the first project the instructor will be be sure to check projects in detail, looking for machine marks, tool marks and other imperfections. Students will be shown a series of pictures of tooling marks that can be removed ( machines marks, file marks, saw marks) and marks that can not be removed ( grain lines and knots)
- Grading Rubric for all projects.docx [ Download ] null