In order for teaching and learning not to be erratic, a teacher has to plan his/her lesson. Planning a lesson is important for the effective implementation of the curriculum, infact it is the only way to correctly implement the curriculum. Lesson plan is a step-by-step or systematic way of arranging, organizing and delivering of instruction.

Lesson plan is a teacher's compass in the classroom and according to an educationist "lesson plan is the teacher's visa to the classroom". It's thus important for a teacher to plan his/her lesson prior to entering the classroom to deliver his/her instruction in order to avoid failure and achieve success in teaching and learning.

A good lesson plan is centred around the objectives of the instruction - feasible objectives that will be achieved within a time frame or period. In developing a lesson plan, the teacher has to consider and answer the following questions :

*what do I want to teach?

*how do I teach it and for how long?

*what instructional material and resources do I need?

*and how do I evaluate the teaching and learning process at the end of the lesson?

The following steps may be more helpful in planning or devising a lesson plan.

1. Topic : identify the topic to be taught, usually from the scheme of work or unit plan.

2. Duration : make a schedule for the lesson including the time frame to teach the topic.

3. Previous knowledge : identify the learners previous knowledge in relation to the topic.

4. Instructional material : identify and acquire materials to aid the teaching and learning of the topic.

5. Teaching method : identify a suitable or combinations of suitable method of teaching the topic.

6. Presentation : map-out a step by step ways to deliver the content of the topic and achieve the stated
 objectives - stating activities of both the teacher and learner at intervals.

7. Evaluation : lastly, device a means to evaluate wether the objectives of the lesson been achieved or not. Evaluations can be in form of a question or performing a task.

As a format, below is a lesson plan I once wrote for a topic in chemistry, it may be helpful but by no means perfect and it's important for every teacher to develop his or her own lesson plan.

School : ****

Class  : SSS 1

Subject : Chemistry

Topic   : Introduction to chemistry

Duration : 45 minutes

Behavioural Objectives : At the end of the lesson, students should be able to :

     (1) define chemistry
     (2) list career prospect in chemistry and
     (3) explain adverse effect of chemicals

Instructional Material : chart/poster showing various industries and adverse effect of chemicals/drugs.

Previous Knowledge : students are familiar with different household chemicals and some adverse effect of chemicals as acids.

Method of Teaching : verbal instruction and discussion method.

Presentation : the teacher presents the lesson in the following ways :

Step I :

Teacher's Activity : the teacher defines chemistry and explain the application of knowledge of chemistry to industries as well as identify useful products from chemical industries.

Student's Activity : the students listen attentively and also identify products of chemical industries around the school.

Step II

Teacher's Activity : the teacher list and explain various career prospects in chemistry as well as identify industries tied to each career.

Student's Activity : the students pay attention.

Step III

Teacher's Activity : the teacher initiate a discussion with students to identify a potential career for themselves in chemistry and give reasons for their choice.

Student's Activity : students respond with their career choice and possible reasons for the choice they've made.

Step IV

Teacher's Activity : Using chart and postals, the teacher initiates discussion on some application and adverse effects of chemicals and chemical industries on human, animals and the environment.

Student's Activity : students in discussion weigh the application and adverse effect of chemicals and chemical industries.

Evaluation
Teacher's Activity : the teacher ask students to answer the following oral questions :

   *Define chemistry
   *Identify five (5) industries that apply the knowledge of chemistry.

Students Activity : the students answer the questions above.

Conclusion

The teacher conclude the lesson by giving assignment to students :
Assignments
(1)List five (5) career linked to chemistry.

(2)State three (3) applications and three (3) adverse effect of chemicals.


(3)Identify ten (10) common products of chemical industries used in everyday life.

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