Here is a worksheet for practicing time prepositions and to get a little more experience thinking in English. The goal of this worksheet is for students to complete the sentences with content they think of on their own.
The plan is fairly simple. First, review the vocabulary, and let students write the meaning of the words in the box on the lines provided so as to minimize confusion. Next, have the students look over the worksheet and make sure that the task is clear and there are no other grammar or vocabulary questions. Once everyone understands the task, let them have at it.
More advanced learners should be able to complete the worksheet by themselves, making original sentences. For lower ability students, working to complete the task in pairs or small groups may be more effective. If students are still having difficulties, the task can be completed as a class. When the worksheet is finished, students can share their original sentences with a partner.