First teaching practice second semester

Hi everyone, I had my first class in this new semester, and I felt comfortable with the group because it was one of the groups I had last semester. This is the first time I followed a lesson plan in a class because I didn´s use any lesson plan in the last semester for any reason I never was given a lesson plan but I had to plan my own class. I started with the warm up activity by asking them to form three groups of 5. I gave a page to each group and a marker , the first group had to write a question in any tense, and the other group had to write the answer for that question. They did a good job and the other group did the same. I could have continued with the activity, but I saw students were not too interested or excited. My tutor told me that I should have continue with the acitivity even though it was time because it is suppose that the warm up activity doesn´t have to last more that 10 min. After that, I thought the students had a reading , but it was not like that, so I addapted the activity differently. I didn´t feel worried because I came up with something quickly, and the teacher told me that it was not noticed by students, but he did noticed because he had written the lesson plan I was using. Most of the activities were changed because of the material I thought student already had. However, it was not a problem. I think students were interesting in the activities and participated in a good way.