Something to learn

A not so good day. Where do I start from? Well, I received the lesson plan yesterday a night. Today I had to begin the class with a new lesson plan; it was about verb patterns (verb + infinitive, verb + gerund, etc.). The warm up was a joke (literally, a joke); I had to tell a joke and then some students had to tell their own jokes. That warm up was to promote students' speaking. I decided to change that warm up because I am not good at telling jokes. Another issue I faced was that the presentation of the lesson was a reading that was in the students' book, and I do not have the students' book; anyway, I had to leave like that. Later, I had to teach the grammar notes, and if I had time, I had to start with the controlled practice.
Today I arrived early to the classroom (as always) and the previous class had not finished, so I did not have much time to prepare the classroom. Students started to arrive one by one. The teacher got there on time and I started my class.
I started with a warm up. The students formed three groups and each of them sent a representative to the front; that person had to sit down in front of his/her group and I put myself behind that person; I showed a flashcard to the rest of the group and they had to mimic what they saw; the representative at the front had to guess the word, the object, the fruit, or the musical instrument I was showing up. each group had 2 minutes to do it and at the end there was a winner. They liked the activity because they had a lot of fun.
The bad part of my teaching was the presentation part. I made them go to their books and make some predictions about the reading based on the pictures. I tried to figure out what the reading was about because I could not get a copy of that part on time, so I was practically "blind" in that part of the lesson. After that, I made the students read the paragraph in pairs because most of them did not have the book. I was not able to plan a good activity for that reading activity and the teacher told me at the end that I had wasted that reading session. Actually, I think she was right without a doubt. I just made them read and discuss the paragraph; the good part was that they participated providing ideas, but I could have done something more to take advantage on that important resource.
Later on, I explained part of the grammar notes. That part was easy and they got the idea really fast. I explained the use of verbs followed by infinitives and verbs followed by an object and an infinitive. My time finished and my class was over.
Feedback time. Teacher Yesenia do know how to give feedback, I insist. She liked my warm up, but the presentation (the reading part) was awful.
What did I learn from this new experience? I learned that I must plan in a different way; I must be prepared in order to face any unexpected situation. Also, I learned that I have to get prepared with a variety of activities to do with readings.
I did not get an excellent grade, but I learned an excellent lesson.