Metal Technologies
PracticalStudent.com has a range of resources for classroom projects in metal, organised by age
Craftsmanspace has project plans for a chess set made of scrap fasteners and a scrap garden snail!
Makezine have some awesome metalwork & welding projects, to suit all ages and abilities
The International Council in Mining & Minerals have information on the use and production of metals including their role in society and sustainability
Wikipedia has a great Timeline of Materials Technology!
Lesson ideas mapped to the Australian Curriculum
Technology Student – some resources are a little outdated, but for the most part the tools and safety content is great
ABC Education – search by topics, lots of videos and interactives! This is a link to the Technologies Resources