“Student-centered activity” is an activity when students are active during the class, they may imagine that some of them are elderly former celebrities and some are journalists who ask them various questions. Such activity is good for practicing present perfect. There are two approaches to this kind of activity.
The first approach is when the teacher may prepare questions and write them on the blackboard. Students ask each other questions, then the teacher asks students these questions or what answers their partners gave. The teacher may ask some other questions concerning the topic. If the students make mistakes, the teacher corrects them and the students repeat the correct variant after the teacher.
The second approach is when the teacher writes some questions as examples and ask students to work in pairs and prepare some more questions. During their work, the teacher writes hers on the board, and then students write up theirs.
As soon as the activity is finished, the teacher asks one pair to sit at the front and tell the class one interesting answer that their partner gave. The rest of the class can ask any questions to the pair and the pair chooses the next pair to sit at the front and speak. For correction, one may prepare some hand signs that the students raise when there is a mistake. The student corrects it himself or asks someone to correct the mistake. It is possible to write the sentences with a mistake on the board and correct it together. This kind of approach is more student-centered. The advantages of student-centered approach are the activity of students and responsibility for their learning.
One more activity is a telephone conversation. It consists of questions and answers. It can be used for practise of various tenses, word combintions and phrases. You may ask your students to phone each other using their mobile phones or they may sit back to back not to be visible to each other.
You should apply the correct vocabulary in your telephone conversation. People often say: “This is her/she”, “What’s up?” “What do you want?” It is recommended to write some versions of holding a phone conversation on the blackboard and use these phrases in some versions.