Dichotomous Key Via S.N.A.I.L

Dichotomous Key via
S.N.A.I.L

ROS ADILA BINTI MUHAMAD HUDRI

[email protected]

SMK Raja Perempuan Kelsom

ROS ADILA BINTI MUHAMAD HUDRI

SMK Raja Perempuan Kelsom
Kuala Kangsar, Perak

Dichotomous Key via S.N.A.I.L

Abstract

Classification of organisms is one of the content standard that included in form
two Science syllabus, where students should be able to differentiate organisms using a
dichotomous key based on common characteristics and able to characterize the major
taxonomy group. Here, the students always has problem to construct the dichotomous
key itself. Dichotomous key is a method used by biologist to identify and classify
organisms systematically. In order to help student to encounter the problems, teacher
came out with Dichotomous Key via S.N.A.I.L. Dichotomous Key via S.N.A.I.L is a
learning aid to help the students to construct the dichotomous key step by step. The
word “snail” is actually an acronym to help student to remember the steps to construct
the dichotomous key and the shell of the snail has rotation notes on classification of
animals. This will enable the students to characterize the animals correctly. The
cuteness of the S.N.A.I.L itself will also attract the students attention that may lead to
fun learning and strengthen the pupil’s understanding.

2

Students could not construct
dichotomous key of animals or plants
based on common characteristics

Help students to construct dichotomous
key of animals correctly via S.N.A.I.L

• All Form Two DLP students (19)
• All Form Three DLP students (10)

The two main groups of organisms are
animals and plants. It can be classified
further into smaller groups based on
their common and different
characteristics.
Dichotomous key is a method used by
biologist to identify and classify
organisms systematically by using series
of couplets
Each couplets contain two statements
describing characteristics of a particular
organism.

What is Dichotomous Key?

“A dichotomous key is a tool created by
scientists to help scientists and laypeople
identify objects and organisms”.

https://biologydictionary.net/dichotomous-key/

"Dichotomous" means "divided into two
parts". Therefore, dichotomous keys
always give two choices in each step.

https://oregonstate.edu/trees/dichotomous_key.html

Examples of Dichotomous Key

https://oregonstate.edu/tree
s/dichotomous_key.html

https://youtu.be/wpKulkADzBk

https://youtu.be/M51AKJqx-7s

S.N.A.I.L

Is a learning aids to construct
Dichotomous Key.
Has shell with rotation notes on animal’s
classification

7

2 X RM
0.30=
RM O.60

RM 0.50

8

S.N.A.I.L is an acronym to help
students to construct dichotomous
key step by step as follows:

S-elect (Selection of animals or plants normally

derive from question)

-N umber (number of key-one fewer number of

selected animal/ plants )

-A rrange (arrange the set of choices a. and b.)

I-dentify (identify the characteristic using

rotation notes on the shell of snail)

-L ocate (locate whether the key is correct

Or not)

Done!

9

1. Teacher explains on how to
construct dichotomous key using
PowerPoint presentation

2. Students use S.N.A.I.L to help them
construct dichotomous key in
pairs.

3. Few students were chose to try it

out in front of the class and peer
assessment will be used.

4. Teacher guides and supervises.

10

NO STUDENT’S NAME UJIAN 1 PRE POST DIFFEREN
MARKS TEST TEST -CES
(All Qns (Q .3b/ (4 marks)
/100m) 4marks)

1 ERNIE SYAZLIANA BINTI 62 1 3 2
2
AKHIRUDIN 2
4
2 HEMA LOSHINI A/P 70 2 4
3
HARIDASS
4
3 MAHASWETA A/P RAVI 62 2 4 2
2
CHANDRAN 3

4 62 0 4
NUR ANNISA SOFEA

BINTI MOHD SHAHRIZAL

5 NUR AZRA QISTINA 60 0 3

BINTI MOHAMAD

HISHAM

6 NUR DINI HUMAIRA 60 0 4

BINTI MOHD FAIZAL

7 NURIN AUFA BINTI AMIR 52 2 4

ADHA

8 TEAVASHINI A/P 64 2 4

MURUGAN

9 VIVENESHWARY A/P 70 0 3

SAMBASIVAM

11

Primary School-KSSR
Year 4 -6 students

Secondary School-KSSM
Form 2-3 students

Teachers
All teachers in schools, colleges
and universities

University Students
All students that learn
classification especially in
Biology.

• This invention based on KSSM for science form 2 syllabus and
can also be used for year 4 primary school students.

• currently exposed to form 2 Science teacher in school and will
be shared to the Kuala Kangsar district teachers.

12

e-MAIL Office phone

[email protected]. 05-7761516.

School Address Google site link

SMK Raja Perempuan Kelsom https://sites.google.com/
view/dichotomous-key-via
33000 Kuala Kangsar, Perak -snail/home

DICHOTOMOUS KEY USING S.N.A.I.L

Prepared by: ROS ADILA MUHAMAD HUDRI