First things first, it might be worth checking if there is a specific lesson plan format that you need to follow. Some schools, colleges and universities have a standardised format to follow as this makes it easier for another teacher to use if you are unexpectedly away from work. While there are many different formats you can use for a lesson plan, most contain the same core elements. The title and time of the lesson are basic pieces of information and a list of required materials ensures no essentials are missed out.
Fortunately, lesson plans can contribute toward both. In the case of teaching, these plans are often approved by a committee before they are presented to the glass. This not only ensures that the material provided is appropriate for the class, but it also reflects on the quality of the teacher as well. Once the plans are approved, the teacher is free to use them to educate his or her pupils. However, if the opportunity arises, adding a bit of spontaneity to the class will do wonders for helping to cement it in your students minds. Thus, feel free to leave a bit of wiggle room when planning your plans.