I have been using Colin’s Coffee Conundrum for years. This is another great resource created by Northumberland NGfL. Students are required to select various quantities and combinations of coffee, water, milk and sugar in order to create the perfect cup of coffee for Colin. Each time students are given feedback and are then required to use the feedback to adjust the quantities in order to create Collin’s perfect cup of coffee.  Great for problem solving and procedure writing.  Permission to link sites and use image received 2/6/2012 by R Taylor, http://www.northumberland.gov.uk/