If you learn biology, three things that will help you to remember what you have learned. 1. Your laboratory work or experiment, 2. Your field work and 3. Your final year project. In the field students cannot lie. They have to show their knowledge and apply it. BUT field work is very costly and not many lecturers are willing to bring their students go to the field. Going to the forest or other field worlks not just visiting factories or exhibition. Field work need knowledge, skill and hardship.