Our Class

Our Class

– Students can choose either to attend physical or livestream lessons. However due to social distancing measures, physical classroom lessons are currently capped at max of 15 per class.

– Lessons are taught from scratch so to ensure every single student have the foundation that is needed to understand each topic holistically and thoroughly. We leave no stones unturned. Lessons are carried out first by going through the concepts followed by problem solving. This allows students to see and understand how the concepts are linked to commonly tested prelim and A level questions. The questions are carefully curated by the teachers with their vast experience in the subject.

– Junior College education is merely a short 2 years and the learning pace is very intense. Students who struggle with Chemistry should start early as once they fallbehind, they will find it very difficult to catch up. So the advice is to seek help early and do not leave it to the last minute. Our experience is that students who start with Twig early enjoy Chemistry more and have less problem doing their tutorials/exams and do well for the final A level exams.

– A Level Chemistry is a content heavy and rule-based subject. There are a lot of rules to follow and it is a huge jump from O Level Chemistry. Let’s see the differences between the different A Level Chemistry levels.

  O Level Pure Chemistry H1 Chemistry H2 Chemistry H3 Chemistry
Programme duration 2 years 2 years 2 years 1 year
Difficulty Level (1 to 10) L3 (reference) L5 L8 L10
Lab Yes No Yes No
Pros Pre-requisite for A Level Chemistry ad Polytechnic Science Courses A scaled down version of H2 Chemistry Meets the requirements of many university courses, e.g. Medical Faculty Good to have for scholarship applications
Cons   Many science-related courses in the university requires H2 Chemistry Content heavy. Rule-based subject with much to remember. Need to have a passion for the subject.
Assessment

Paper 1
1 hr
40 marks
Paper 2
1 hr 45 min
80 marks

Paper 1
1 hr
30 marks
Paper 2
2 hr
80 marks

Paper 1
1 hr
30 marks
Paper 2
2 hr
75 marks

Paper 1
2.5 hr

100 marks

 

Paper 3 (Practical)
1 hr 50 min

40 marks

 

Paper 3
2 hr
80 marks
Paper 4
(Practical)
2.5 hr

55 marks

 

Detailed List of updated topics for A Level Chemistry in 2021

  H1 Chemistry Topics   H2 Chemistry Topics   H3 Chemistry Topics
1 Atoms, molecules and Stoichiometry 1 Atoms, molecules and Stoichiometry 1 Molecular Orbital Theory
2 Redox 2 Redox 2 UV-Vis Spectroscopy
3 Atomic Structure 3 Atomic Structure 3 IR Spectroscopy
4 Chemical Bonding 4 Chemical Bonding 4 NMR Spectroscopy
5 Energetics (reduced) 5 The Gaseous State 5 Mass Spectrometry
6

Kinetics (reduced)

6

Energetics

6 Advanced Stereochemistry
7

Equilibrium (reduced)

7

Entropy, Gibbs Free Energy

7 Kinetics and Thermodynamic Controls
8 Acid Base Equilibrium (reduced) 8 Kinetics 8 Advanced Reaction Mechanisms
9 Nanomaterials
[Different from H2]
9 Equilibrium (Kc and Kp) 9  
10 Introduction to Organic Chemistry (reduced) 10 Acid Base Equilibrium
(Ka, Kb, Kw) and Titration Curves
10  
11 Alkanes (reduced) 11 Solubility Equilibrium 11  
12 Alkenes (reduced) 12 Electrochemistry 12  
13 Arenes (reduced) 13 Introduction to Organic Chemistry 13  
14 Halogen Derivatives (reduced) 14 Alkanes 14  
15 Hydroxy Compounds (reduced) 15 Alkenes 15  
16 Aldehydes and Ketones (reduced) 16 Arenes 16  
17 Carboxylic Acid and Derivatives (reduced) 17 Halogen Derivatives 17  
18 Polymer Chemistry [Different from H2] 18 Hydroxy Compounds 18  
19 Period 3 Elements 19 Aldehydes and Ketones 19  
20 Group 1 Elements
[Different from H2]
20 Carboxylic Acid and Derivatives 20  
21 Group 17 Elements 21 Nitrogen Compounds 21  
22   22 Period 3 Elements 22  
23   23 Group 2 Elements 23  
24   24 Group 17 Elements 24  
25   25 Transition Metals 25  

Sec 3 and Sec 4 O level Chemistry topics

  Sec 3 O Level Chemistry Topics   Sec 4 O Level Chemistry Topics
1 Kinetic Particle Theory 1 Metals
2 Experimental Techniques 2 Electrolysis
3 Separation Techniques 3 Electric Cells
4 Elements Compounds and Mixtures 4 Air Pollution
5 Atomic Structure 5 Ammonia and Haber Process
6

Ionic Bonding

6 Energy Changes
7

Covalent Bonding

7 Speed of Reaction
8 Metallic Bonding 8 Introduction to Organic Chemistry
9 Acids and Bases 9 Alkanes
10 Writing Chemical and Ionic Equations 10 Alkenes
11 Mole Concept 11 Alcohols
12 Chemical Calculations 12 Carboxylic Acids and Esters
13 Preparation of Salts 13 Macromolecules
14 Qualitative Analysis 14 Revision 1
15 Redox 15 Revision 2

Sec 3 and Sec 4 IP Chemistry topics (depth of topics vary depending on the schools)

  Sec 3 IP Chemistry Topics   Sec 4 IP Chemistry Topics
1 Acids Bases and Salts 1 Qualitative Analysis
2 Mole Concept/Stoichiometry 2 Redox
3 Atomic Structure 3 Electrochemistry
4 Periodic Table 4 Chemical Energetics
5 Chemical Bonding and Structure 5 Chemical Kinetics
    6 Chemical Equilibrium
    7 Organic Chemistry