From Pencil to Computer in Math Education JUAN JOSÉ PRIETO-VALDÉS (PART-I, from IV)
Pencil Part 27
2
Pencil Part 27
description
materials
Transcript of Pencil Part 27
![Page 1: Pencil Part 27](https://reader035.fdocuments.in/reader035/viewer/2022062310/5695d3ce1a28ab9b029f4217/html5/thumbnails/1.jpg)
Pencil Part 27
![Page 2: Pencil Part 27](https://reader035.fdocuments.in/reader035/viewer/2022062310/5695d3ce1a28ab9b029f4217/html5/thumbnails/2.jpg)
Grease pencils
• They write on virtually any surface (including glass, plastic, metal and photographs). The most commonly found grease pencils are encased in paper (Berol and Sanford Peel-off), but they can also be encased in wood (Staedtler Omnichrom).