The phrase "material and techniques" refers to the substances and methods used to create something. It means the physical materials or tools used, as well as the specific ways they are employed, to produce a desired result. Full definition
This course introduces students to a variety of materials and techniques used in contemporary sculpture. (design.lsu.edu)
It contains provocative criticisms, knowledgeable technical discussions and timely exploration of new materials and techniques. (sculpture.org)
Once we have a clear idea of what we want, it's a matter of trial and error with different materials and techniques until we achieve our initial vision. (blog.folksy.com)