The importance of Science as a school
subject depends mainly on its multifarious values in our daily life. Present age
is known as the age of science. Inspite of the efforts made by the government
the popularity of Science among students in different schools of India is not
quite of a one that can be appreciated of. Most of the dropouts from schools are due to subjects
like Science, Mathematics and English. It depends upon the teacher how he
chooses the content, how he/she finds out ways to make learning of Science fun for
students and not a burden.How do we teach our students using appropriate pedagogical tools?What are the different teaching aids that could be used to make learning fun for students?Within the stipulated time frame of 40-45 minutes,teachers should try to plan out their lessons in such a way so that students can derive maximum benefit out of it.For most of the students willing to choose chemistry as their future career,learning of the periodic table holds utmost importance.Apart from this it also has significance in everyday applications. Below is a sample plan on an important topic"The Periodic Table".
Subject:Science
Topic:Periodic
Table
Class:X
Time:2
periods(80 minutes)
Teaching
aids:charts,power point presentation,questionnaire.
Context
The topic chosen is “periodic table”.The
content has been selected keeping with the cognitive level of the learners.The
students will get an overview idea about different elements, their properties, atomic size, atomic radius, electronegativity, electron
affinity etc. Focus has been made to help the child proceed from the lowest
level of the cognitive domain remembering to the most complex one creating.
Aim
The prime aim is to develop the
cognitive aspect of the students.
Skill
The students will be able to draw the
periodic table with different elements arranged in a sequence in rows and columns.
Instructional
plan
(1)Topic-Periodic table
(2)Content analysis-
(A)History-a brief introduction
-detail explanation
(B)Classification of element
-category(s,p,d,f)
-properties
-explanation
(3)Practice to learn-Pedagogical tool
(a)History-power point presentation
(b)Classification of elements-charts.
(c)Video games (names of websites)
(4)Pedagogical method
(a) Teacher Centered Method(TCM)
(b) Student Centered Method(SCM)
For explaining the topic to the students Lecture-cum Demonstration method can be chosen.
(5)Learning objectives
An important learning objective is the
development of intellectual skills of the students.
(a)Cognitive
-Knowledge:
(1)The child will be able to recall and
recognize different elements of the periodic table.He /she will be able to
recognise the noble gases,lanthanides,actenides etc.
(2)The child will be able to
differentiate one element from the other
based on their properties.
-Understanding
-Applying
-Analysing
-Synthesis
-Creating: The students will be able to
develop new arrangement of elements.
(b)Psychomotor
-Skill:Preparation of chart of periodic
table.The students will be able to draw the periodic table with different
elements arranged in a sequence in rows and columns.
(c)Affective domain
-Attitude: It
can vary from student to student. In a classroom some of the students can
develop positive attitude towards the topic and may be willing to choose
chemistry as their future career,carrying out research in its different
fields.Some others might find it very hard to grasp the content and may develop
a negative attitude towards the same.
(6)Steps according to method-Teacher Student
activities.
(1)Questioning technique
(2)Illustration
(3)Explaining
(4)Blackboard
Ø Teacher activities would include
explanation of the topic-the periodic table with the help of chart.
Ø Student activities would include –listening
to the teacher,giving attention to the
words of the teacher.
Ø The teacher will ask few questions on
the basis of the topic explained-
(Q1)In the periodic table the atomic
radius of the elements decreases across the period.Why?
(Q2)Why the Noble gases are considered
as stable gases?
(Q3)Who developed the Modern Periodic
table?
Ø Students will answer.
Ø The teacher will give a general
conclusion on the topic on the basis of the answers of the students.
(7)Evaluation
It helps the teacher to determine to
what degree learning occurs after the content has been discussed in class.It
makes the teaching learning process quite easier.
·
The
time allotted to discuss the content can be taken as:2 periods(80 minutes)
·
The
students can be evaluated on the basis of an MCQ
based test on the periodic table.
·
The
test can be conducted for 20 marks with 1 marks for each question.
·
The
time duration can be alloted as 20 minutes.
·
No
of students in one group can be taken as 14 in number.
· After the completion of the test,highest marks obtained by the students can be found out.Let's suppose that the highest mark obtained is 17 and the lowest mark obtained is 6.Based on this the grading of the students can be done.
GRADING
OF THE STUDENTS ON THE BASIS OF THE MCQ TEST
Range
|
Remark
|
15-20
|
good
|
10-15
|
average
|
5-10
|
poor
|
.
MCQ BASED TEST ON PERIODIC
TABLE
Marks=20
Time=30 Minute
Choose the
correct answers and tick mark the
answers. Each question carries one mark. You have to attempt all the questions.
1. Which of the following is the 1st
element in the periodic table?
a. He b. N c. H d. Na
2. Which of the followings elements is
in gaseous state?
a. Al b. Cl c. Na d. Li
3. How many periods are on the periodic
table?
a. 18 b. 25 c. 7 d. 30
4. Which groups contains the noble
gases?
a. 17 b. 10 c. 18 d. 15
5. Which element has an atomic no of 27?
a. C b. Ca c. Cu d. Cr
6. Name the scientist who gave the
law of octave?
a. Mandelev b. Newlands c. Dalton d. Doberneir
7. Which of the following is not an
inert gas?
a. Helium (He) b. Argon (Ar) c. Bromine (Br) d. Radon (Rn)
8. Which group of elements in modern
periodic table is referred to as ‘alkali metals’?
a. Group 1 b. Group 2 c. Group 17 d. Group 18
9. Group 17 elements are called
………………………
10. Modern periodic table is based
on……………………………
11. When we move from left to right
across a period, the electron affinity
a. Remains the same b. Approaches zero c. Decreases d. Increases
12. Among the halogens which has higher
boiling point?
a. Cl b. Br c. F d. I
13. In group from top to bottom electron
affinity
a. increases b. Decreases c. Remain same d. None
14. Which of the following is halogen
elements?
a. H b. F c. C d. N
15. Which of the following is not a
noble gas?
a. Be b. He c. Ne d. Xe
16. The least reactive elemant in
periodic table are ………………..
17. Both of elements of 1st
period contains valence electrons in……………
18.Group A elements are called………………..
19. Physical properties of elements
depends on the…………….
20. Elements in modern periodic table
are are arranged on the basis of………………………………..
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