Une idée de génie - Group project (series of lessons) based on Dragon's Den

This is a series of 4 lessons (possibly more depending on abilities and length of lessons plus a final lesson when the students present their invention. The students work in small groups to come up with an invention and eventually pitch it to an "investor". There are 4 very detailed PowerPoints with a particular theme for each lesson: Finding and developing their idea / design their invention and ask for a patent / Calculate the cost of production and Advertising - Marketing / Decide the level of investment and write their pitch. For each lesson the students are guided through a series of tasks to complete. Also included are word documents with additional resources such as the price for the various costs, spreadsheet to record costs, letter from the investor and Patent document. This would be suitable for KS4 or KS5 although it could easily be simplified for KS3.