Which of the following is part of the lesson's opening phase?

The opening phase of a lesson is crucial for setting the stage for the learning that will follow. Input is a key component of this phase as it involves providing students with the necessary information or concepts that will be explored during the lesson. This could include introducing new vocabulary, presenting background information, or engaging students with a thought-provoking question related to the lesson topic.

By effectively delivering input, educators can capture students' attention and prepare them for the subsequent activities, reinforcing prior knowledge and establishing connections to new content. This initial engagement is essential for fostering student interest and ensuring that they are mentally prepared to dive deeper into the subject matter as the lesson progresses.

In contrast, modeling, which typically occurs after the opening phase, demonstrates how to apply the knowledge or skills introduced. Closure/evaluation, on the other hand, happens at the end of the lesson to assess understanding and reinforce what has been learned, while ongoing checking for understanding is an ongoing process throughout the lesson to gauge student comprehension.