This lesson covers preparing stocks, sauces, and soups for commercial kitchens and catering operations. Stocks are flavorful liquids made by simmering meaty bones, seafood, and vegetables in water with aromatics. There are various types of stocks including chicken stock, fish stock, and vegetable stock. Soups are based on stocks and can be clear, thickened with a roux or other thickener, or other varieties. The lesson teaches how to properly prepare, cook, and store stocks and the various soup classifications including clear soups, thick soups, cream soups, and other types. Learners are expected to demonstrate skills in preparing required stocks, soups, and sauces for