This module uses screencasts and interactive simulations to explain how a recycle stream is used in a process. It then provides a step-by-step quiz simulation and example problems to allow the user to test themselves. Your retention of material in this module will increase if you write down reasons for your answers to ConcepTests, questions in screencasts, and questions to answer before using interactive simulations, and you try to solve the example problems before watching the screencast solutions.  We suggest using the learning resources in the following order:

1. Attempt to answer the multiple-choice ConcepTest and solve the example problem before watching the screencasts or working with the simulation.
2. Watch the screencasts that explain recycle streams and answer the question within the second screencast.
3. Review important equations for recycle mass balances.
4. Use the interactive simulations to further understand recycle in reactive and non-reactive processes.
5. Use the quiz interactive simulation to test your understanding by carrying out mass balances in a step-by-step procedure.
6. Try to solve the example problems before watching the solutions in the screencasts.
7. Answer the ConcepTests.
8. Look at the key points, but only after trying to list the key points yourself.