Quadratic expressions for area and volume

Four problems where algebraic techniques are needed to find expressions for area or volume. Diagrams and answers given in ppt. Word document contains two levels of scaffolding for each problem - first level breaks the problem down into steps and the second level gives more detail about each step. Used initially with the problem on the front of a colored card (green for first two; amber for third and red for fourth to indicate level of complexity) and the scaffolding stuck onto the.