How to Start Using Classroom Assessment Techniques in Your Classroom by @n8ngrimm | Ecology of Education http://bit.ly/aArU3h Great post! How to Use Classroom Assessment Techniques in Your Classroom http://bit.ly/cekUHZ ~> Formative assessment moves student learning forward.
Flux-cored arc welding. Flux-cored arc welding (FCAW or FCA) is a semi-automatic or automatic arc welding process. FCAW requires a continuously-fed consumable tubular electrode containing a flux and a constant-voltage or, less commonly, a constant-current welding power supply.
1 Do your cleaning in a separate area from your soldering. Sand first then wipe off dust and hand oils.  Flux and brushâ Flux is an oxygen reducing agent that will facilitate soldering and reduce firescale. You will also need a small paint brush or flux brush to apply flux to your solder joints.