Active participation is the correct principle of learning being followed by the teacher in this scenario. Active participation refers to engaging students in the learning process by involving them in activities that require them to actively think, question, and participate.

Explanation:
1. Importance of Active Participation: Active participation is a crucial aspect of effective learning as it promotes deeper understanding, critical thinking, and knowledge retention. When students actively participate in the learning process, they become more engaged and motivated, leading to better learning outcomes.

2. Encouraging Questions: By asking students to come up with questions, the teacher is promoting active participation. When students generate their own questions, they are actively thinking about the topic, identifying areas of confusion, and seeking clarification. This process helps them develop a deeper understanding of the subject matter.

3. Presentations: By assigning presentations to students, the teacher is further encouraging active participation. Presentations require students to research, organize information, and communicate their understanding of the topic to their peers. This active involvement helps students develop their presentation skills, enhance their knowledge, and engage with the content on a deeper level.

4. Benefits of Active Participation: Active participation in the learning process has several benefits. It promotes critical thinking skills, as students are encouraged to analyze and evaluate information. It also fosters independent learning, as students take ownership of their learning by actively seeking knowledge and solutions. Additionally, active participation enhances communication and collaboration skills, as students engage in discussions, debates, and group activities.

5. Application of Other Principles: While active participation is the main principle being followed in this scenario, other principles of learning may also be incorporated. For example, learning as a social activity is also evident as students engage in presentations and group discussions. Transfer of learning may occur as students apply their knowledge and skills from one context to another. Reconstruction of knowledge may also take place as students form new understandings based on their active participation and interactions with the content.

In conclusion, the teacher in this scenario is following the principle of active participation by encouraging students to ask questions and engage in presentations. This approach promotes deeper understanding, critical thinking, and knowledge retention among students.