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Chemistry tuition for Holy Innocents' High School students
Live online Chemistry tuition for Holy Innocents' High School students in secondary 3–4. Bring recent schoolwork and teacher feedback so our tutors can see where your child needs help and plan the lessons.
Secondary 3–4
Courses and years
Pure Chemistry
Years 3–4
Combined Science (Chemistry)
Years 3–4
Bring recent schoolwork and the current topic list so we can choose a suitable class.
Study guide · 01
Particles, bonding and structure: explain properties precisely
Pure Chemistry questions can ask students to connect a structure with an observable property. Identify the type of particles, how they are arranged and the forces or bonds relevant to the property. A statement about melting needs a different explanation from one about electrical conductivity, even when both questions concern the same substance.
For a simple molecular substance, distinguish the forces between molecules from the covalent bonds within each molecule. For an ionic substance, distinguish the strength of the lattice interactions from the ability of ions to move. Those distinctions prevent a correct term from being used in an incorrect explanation.
Compare two substances using the same property. Explain how each structure affects it, then describe the difference. Try the explanation aloud without notes. If you are unsure which particles or forces matter, review those first.
Study guide · 02
Chemical calculations: make each step follow the equation
Plan the calculation: convert the given quantity to moles, use the balanced equation’s mole ratio and convert to the quantity asked for. Label each substance so you can check you are comparing the right pair.
Check the conditions in the question. A gas-volume calculation needs the stated conditions or molar volume. A solution calculation needs consistent volume units. If the question supplies information about excess or limiting quantities, use it before deciding how much product can form. Select the method from the evidence given.
The task
5.0 g of calcium carbonate reacts completely with excess hydrochloric acid. Given Mr(CaCO₃) = 100 and a gas molar volume of 24 dm³/mol at the stated conditions, calculate the carbon dioxide volume. Equation: CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂.
Worked response
Amount of CaCO₃ = 5.0 ÷ 100 = 0.050 mol. The CaCO₃:CO₂ mole ratio is 1:1, so 0.050 mol of CO₂ forms. Volume = 0.050 × 24 = 1.2 dm³.
Convert the calcium carbonate mass to moles, then use the 1:1 ratio to find the carbon dioxide amount. The acid is in excess, so the calcium carbonate determines how much gas forms. Finally convert the gas amount to volume.
Study guide · 03
Connect reactions across acids, redox, energetics and rates
Reaction topics become more useful when the student can explain the same change in several ways. An acid reaction can be represented by an equation, identified through observations and used in a calculation. A redox question can ask how oxidation states or electron transfer establish what was oxidised and reduced. Keep the definition connected to the species in the question.
For energetics, track where energy is transferred and distinguish bond breaking from bond formation. For rate questions, identify the changed condition and explain its effect on relevant collisions. If a graph is supplied, distinguish a faster reaction from a larger final amount of product; they describe different features of the results.
The Periodic Table, organic chemistry and air-quality topics also need explanation and application. Use the official outcomes to choose appropriate examples. A named topic is a starting point for revision; the verbs in its outcomes indicate whether the student should recall, explain, calculate or interpret information.
Study guide · 04
Practical Chemistry: observations, data and evaluation
Practical preparation includes choosing a method, making careful observations, processing results and evaluating the conclusion. For qualitative analysis, keep the test, observation and inference as separate steps. A colour change or precipitate is an observation; the identification of a substance is the conclusion supported by it.
When evaluating an experiment, identify the actual source of uncertainty and explain how the proposed change addresses it. Repeating measurements helps examine consistency, but it does not automatically remove a systematic problem in the method. A useful improvement needs a specific reason linked to the apparatus, measurement or procedure.
We use apparatus diagrams, results and experiment questions to practise planning and data interpretation online. Bring practical feedback as well as theory papers. Hands-on apparatus work takes place through the school’s laboratory programme.
Study guide · 05
A revision sequence for Pure Chemistry in Sec 3–4
Review particles, structure, formulae and equations, then practise the calculations and reactions that use them. Use the twelve-topic syllabus to check coverage and try questions without notes to see what still needs work.
Within a topic, alternate explanation questions with calculations and data interpretation where the outcomes require them. Later, mix topics so that the student must choose the relevant idea. Review multiple-choice distractors by explaining why each alternative fails; for structured questions, check that each part of the task has been answered.
Before an assessment, practise timed sections and full papers. Note where you lose time and check the working remains clear. Tutors use those mistakes to plan lessons, followed by platform practice and spaced review. Share the subject code and examination year when arranging a trial.
Study guide · 01
Structured answers: separate an observation from an explanation
Check what the question asks for. An observation describes what is seen or measured. An explanation gives the chemical reason. A conclusion says what the results show. Answer that part directly.
Use precise language. “A gas is produced” identifies an observable change but does not name the gas. Naming a gas requires appropriate evidence or other information in the question. Where an equation is requested, confirm the substances and balance it before using its coefficients in later working.
The task
In a written experiment scenario, a gas is bubbled through limewater, which turns milky. State the observation and the conclusion supported by the test.
Worked response
Observation: The limewater turns milky. Conclusion: The gas contains carbon dioxide.
“Turns milky” is the observation. Carbon dioxide is the conclusion from that test. Keep the distinction when answering other qualitative-analysis questions.
Study guide · 02
Calculations and data questions: show a method that can be checked
Label the substance and quantity on every calculation line. Read any equation or data given before choosing a relationship. Convert units where required and show how the values connect to the unknown. Clear working makes it possible to identify whether an error began with chemistry, unit conversion or arithmetic.
For a graph or table, read the labels and units before interpreting the pattern. Describe a trend using the quantities involved, then use the relevant concept to explain it. A larger final value and a steeper initial gradient can mean different things. Give numerical evidence when the question asks for support from the results.
After checking a calculation, explain why you used those values. This helps you choose the information when another question gives it in a different order.
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Class format
Live online
Weekly duration
1.5 hours
Levels
Secondary 3–4
Between lessons
Subject practice on the DeepThink platform
Practice is included as part of the classes.
Registration
2027 school year
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Class registration for the 2027 school year is open. Bring recent schoolwork to help us plan a useful first lesson.
About Holy Innocents' High School
PSLE cut-off point for Holy Innocents' High School
MOE publishes the PSLE score of the first and the last student posted into each school at each posting group. Below are Holy Innocents' High School's figures for the 2026 Secondary 1 intake — the 2025 PSLE cohort. The last student's score is what is usually meant by the school's cut-off point.
| Posting group | Non-affiliated | Affiliated |
|---|---|---|
| Posting Group 3 | AL 11–14 | AL 13–22 |
| Posting Group 2 | AL 21–24 | AL 23–25 |
| Posting Group 1 | AL 25–27 | AL 26–28 |
Cut-off points move by a few points from year to year, and not every student who met the cut-off was posted here — some are tie-broken out. Read these as a guide to where a school sits, not as a threshold to clear.
Actual 2026 Secondary 1 intake, from MOE School Finder — last verified on 12 August 2026. MOE School Finder ↗
About Holy Innocents' High School
Holy Innocents' High School (HIHS) (Simplified Chinese:圣婴中学, Traditional Chinese: 聖嬰中學, pinyin: Shèngyīng Zhōngxué) is a Catholic school in Hougang, Singapore.
Founded: 1892
School Overview
Holy Innocents' High School traces its origins to 1892, when it began as Tao Nan School — one of the earliest Chinese mission schools in Singapore. The institution transitioned into a Catholic boys' school in 1920 and became co-educational in 1985, welcoming both boys and girls. It operates as a government-aided school with a Christ-centred philosophy, guided by the motto "谦诚、和爱" (Sincerity and Compassion), which reflects its emphasis on humility, character formation, and care for others.
The school holds affiliations with Holy Innocents' Primary School, which provides priority admission to the secondary school, and with Catholic Junior College, offering a connected pathway to pre-university education. Distinctive programmes include the Good Samaritan Programme for community service and a Personalised Digital Learning Programme (PDLP) that equips every student with an iPad for classroom learning — a feature implemented since 2021.
Admission Process
Entry to Holy Innocents' High School follows the standard PSLE posting system, with indicative cut-off points varying by affiliation status and posting group. Based on the 2024 PSLE scores for the 2025 intake, the approximate ranges were:
Posting Group 1 (Express): Affiliated 26–29, Non-Affiliated 25–27
Posting Group 2 (Normal Academic): Affiliated 23–25, Non-Affiliated 21–22
Posting Group 3 (Normal Technical): Affiliated 13–22, Non-Affiliated 10–13
These figures are indicative and are finalised after each posting exercise concludes. Students from Holy Innocents' Primary School receive priority consideration during Phase 1.
Direct School Admission (DSA) is available for students with strengths in areas such as badminton, basketball, choir, modern dance, leadership, or academics. DSA applications are typically submitted between May and July through the MOE DSA portal, with no application fee required. Students who receive and accept a DSA offer are committed to attending the school and do not participate in the Secondary 1 posting exercise.
The school operates under Full Subject-Based Banding (Full SBB), which allows students to take individual subjects at different levels of difficulty based on their aptitudes, rather than being placed in a fixed stream. Parents can find further details at the school's annual open house, usually held around May or June, and through the school website for Secondary 1 registration information.
Curriculum and Academic Programme
Holy Innocents' High School follows the national secondary curriculum, with students preparing for the GCE O-Level examinations. Core subjects include English Language, Mathematics (Elementary and Additional Mathematics for the Express stream), Sciences (offered in combinations such as Physics-Chemistry or Chemistry-Biology), and Humanities (Social Studies paired with Geography or History). Elective subjects include Principles of Accounts, Nutrition and Food Science, Literature in English, and others. Mother Tongue Language options span Higher Chinese, Malay, and Basic Chinese, with Tamil available at designated centres.
The school's Applied Learning Programme (ALP) centres on Journalism and Broadcasting, developing students' communication skills and analytical thinking through practical media projects. Its Learning for Life Programme (LLP), known as the Good Samaritan Programme, cultivates youth leadership through structured community outreach and service learning. The PDLP integrates iPad-based learning into daily lessons, with particular emphasis on mathematics and science subjects.
Specialised elective pathways in STEM and bilingual studies are available to support students progressing toward either polytechnic or junior college routes after graduation.
Facilities and Co-Curricular Activities
The campus includes smart classrooms fitted with interactive technology, a well-stocked library, dedicated science and computing laboratories, and studios for art and creative work. Sports facilities include courts for badminton and basketball, as well as a field used for football. Digital infrastructure has been upgraded in recent years to support the school-wide iPad programme.
The school offers more than 20 Co-Curricular Activities (CCAs) across four categories:
Sports: Badminton, Basketball (boys), Netball (girls), Football (boys), Wushu, Floorball (girls), and Bowling.
Uniformed Groups: National Police Cadet Corps (NPCC), St John Brigade, Scouts (boys), and National Cadet Corps (Land, boys).
Performing Arts: Chinese Orchestra, Choir, Modern Dance, and English Drama.
Clubs and Societies: Art and Crafts, Chinese Weiqi, Media and Journalism, Leadership, and Community Service.
CCA participation is an integral part of student development at the school, supporting character growth and leadership. Many of these activities also serve as talent areas for DSA applications.
Student Life and School Culture
Holy Innocents' High School operates as a single-session co-educational school, with the school day typically running from around 7:30 AM to 3:00 PM, followed by CCA sessions. Class sizes are approximately 40 students, supported by form teachers and school counsellors who provide pastoral care covering academic guidance and student well-being. The school also has Special Educational Needs (SEN) officers to assist students with specific learning requirements.
The Catholic ethos of the school is reflected in its values-driven programmes, including anti-bullying initiatives and resilience-building workshops. Orientation camps and peer mentoring help incoming Secondary 1 students adjust to secondary school life. The school community is often described by parents as warm and supportive, with a culture that encourages students to develop both personal responsibility and compassion for others.
Frequently Asked Questions about Holy Innocents' High School
Is Holy Innocents' High School a good school?
Holy Innocents' High School is a government-aided Catholic secondary school with a heritage dating back to 1892. It provides a holistic education through programmes such as the Good Samaritan Programme and its Applied Learning Programme in Journalism and Broadcasting. The school offers a wide range of CCAs and academic subjects, and its Christ-centred values emphasise character development, compassion, and leadership. Parents are encouraged to attend the school's open house to assess whether it suits their child's needs.
Is Holy Innocents' High School a co-educational school?
Yes, the school has been co-educational since 1985, admitting both boys and girls.
Does Singapore officially rank secondary schools?
The Ministry of Education does not publish official rankings for secondary schools in Singapore. This policy encourages families to evaluate schools based on factors such as programmes, co-curricular offerings, and school culture rather than a single ranking metric.
What are the PSLE cut-off points for Holy Innocents' High School?
Under the Full Subject-Based Banding system, the indicative PSLE score ranges for the 2025 intake were: Posting Group 3 — non-affiliated 10–13, affiliated 13–22; Posting Group 2 — non-affiliated 21–22, affiliated 23–25; Posting Group 1 — non-affiliated 25–27, affiliated 26–29. These figures are based on the preceding year's posting exercise and may change annually.
How does admission to Holy Innocents' High School work?
Students are admitted primarily through the Secondary 1 Posting Exercise based on their PSLE results. Affiliated students from Holy Innocents' Primary School receive priority consideration. Alternatively, students can apply via Direct School Admission (DSA) for demonstrated talent in sports, performing arts, leadership, or academics. Applications are submitted through the MOE DSA portal, typically in May, at no cost.
How do I apply via DSA to Holy Innocents' High School?
Applications are made through the MOE DSA-Sec Portal during the application window, which usually opens in May. Students can apply based on talent areas such as sports, performing arts, or leadership. There is no application fee. Successful DSA applicants are committed to attending Holy Innocents' High School and will not participate in the S1 posting exercise. The school's website lists the specific talent categories available each year.
Is Holy Innocents' High School affiliated with a primary school?
Yes, the school is affiliated with Holy Innocents' Primary School. Students from the affiliated primary school benefit from priority admission and more favourable indicative PSLE score ranges during the posting exercise.
What O-Level subjects are offered at Holy Innocents' High School?
The school offers a range of O-Level subjects including English Language, Mathematics, Additional Mathematics, Biology, Chemistry, Physics, Science combination subjects, Social Studies with Geography or History, Literature in English, Chinese Language, Higher Chinese Language, Malay Language, Art, Computing, Design and Technology, Nutrition and Food Science, Principles of Accounts, Music, and Physical Education. The exact subject offerings may vary from year to year.
What is Full Subject-Based Banding at Holy Innocents' High School?
Full Subject-Based Banding (Full SBB) allows students to study individual subjects at varying levels of difficulty according to their strengths. Implemented from 2024, this system replaces rigid streaming with mixed form classes and flexible subject combinations, helping students build on their abilities across different disciplines.
What CCAs does Holy Innocents' High School offer?
The school provides more than 20 CCAs in four categories. Sports include Badminton, Basketball, Netball, Football, Wushu, Floorball, and Bowling. Uniformed Groups include NPCC, St John Brigade, Scouts, and NCC (Land). Performing Arts groups include Chinese Orchestra, Choir, Modern Dance, and English Drama. Clubs and Societies include Art and Crafts, Chinese Weiqi, Media and Journalism, Community Service, and Leadership.
What is the Applied Learning Programme at Holy Innocents' High School?
The Applied Learning Programme (ALP) focuses on Journalism and Broadcasting. Through a mix of classroom instruction and hands-on media projects, students develop critical thinking and communication skills. The programme also includes opportunities to participate in related competitions.
What is the Good Samaritan Programme?
The Good Samaritan Programme is the school's Learning for Life Programme (LLP). It centres on community youth leadership through service learning, where students design and carry out projects that address the needs of specific beneficiary groups, fostering a sense of compassion and social responsibility.
What are the school fees for Holy Innocents' High School?
Fees depend on citizenship status — Singapore Citizens, Permanent Residents, and International Students each have different fee structures. Singapore Citizens and PRs benefit from government subsidies. Detailed monthly fee information is available on the MOE website or by contacting the school directly.
What is the history of Holy Innocents' High School?
The school was established in 1892 as Tao Nan School, one of Singapore's first Chinese mission schools. It was subsequently renamed and reorganised as a Catholic institution. The primary section was separated in 1985, and the school underwent facility upgrades during the 1990s. Throughout its history, it has maintained a focus on holistic, values-based Catholic education.
Is Holy Innocents' High School affiliated with a junior college?
Yes, the school is affiliated with Catholic Junior College, which provides a connected post-secondary pathway for students who wish to pursue the A-Level route after completing their O-Levels.
Does Holy Innocents' High School provide support for students with special educational needs?
Yes, the school has dedicated Special Educational Needs (SEN) officers who provide support for students with specific learning requirements.
What are the contact details for Holy Innocents' High School?
The school is situated at 1191 Upper Serangoon Road, Singapore 534786. It can be reached by phone at 6283 3381 or by email at [email protected].
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