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IB Biology - Everything you should know

There are 6 base subjects of International Baccalaureate (IB) Biology course on Standard Level (SL) and additional 5 on a Higher Level (HL).

On top of that, schools can also select one optional topic out of 4 available.

Cell Biology

Molecular Biology

Genetics

Ecology

Evolution and Biodiversity

Human Physiology

IB Biology Syllabus (Last assessment in 2024)

For IB Biology Higher Level (HL) students there are five additional topics to be covered including:

Nucleid Acids
Metabolism, Cell Respiration and Photosynthesis
Plant Biology
Genetics and Evolution
Animal Physiology

On top of that, there are 4 optional topics that schools can select to include in their program

Option A: Neurobiology and Behavior
Option B: Biotechnology and Bioinformatics
Option C: Ecology and Conservation
Option D: Human Physiology

If any of the IB Biology syllabus topics are causing you a headache, we’re here to help.

Our tutors have over 8 years of exceptional experience in teaching IB Biology both at the Standard and Higher Levels.

Sign up for your first tutoring session today!

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IB Biology Syllabus Changes 2023+ (First assessment in 2025)

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Nov 21, 2023

IB Biology New Syllabus 2023: Navigating the Changes with Think Smart Tutors

Nov 21, 2023

The IB Biology curriculum evolves, and 2023 brings fresh updates designed to enhance students' understanding of the subject. The new DP biology course has been launched in 2023. First assessment will take place in May 2025.

What's the difference between IB Biology HL and SL ?

In the International Baccalaureate (IB) Diploma Programme, students can choose to study Biology at either the higher level (HL) or standard level (SL). The main difference between the two is the level of depth and breadth of the material covered.

Higher Level (HL) (240h)

Covers the same material as Standard Level, but in greater depth
Students are expected to have a stronger understanding of the concepts and be able to apply them in a variety of contexts
HL students are also required to study additional topics chosen from a list provided by the IB
HL assessments include both external and internal assessments

Standard Level (SL) (150h)

Students are expected to have a good understanding of the concepts and be able to apply them in a variety of contexts
SL assessments include both external and internal assessments

In general, HL Biology is more challenging and time-consuming than SL Biology, as it covers a wider range of material in greater depth and requires more independent research. It is important for students to carefully consider their interests, goals, and academic strengths when deciding whether to pursue HL or SL Biology.

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IB Biology HL Exam - How is the IB Biology exam structured?

In the International Baccalaureate (IB) Diploma Programme, the Biology external assessment (80%) for Higher Level (HL) students is structured as follows:

Paper 1: In paper 1 there are 30 (at SL) or 40 (at HL) multiple-choice questions. It covers all parts of the HL Biology syllabus.
Paper 2: Paper 2 contains short-answer and extended-response questions on the core (and Additional Higher Level (AHL) material at HL).
Paper 3 has two sections; Section A contains one data-based question and several short-answer questions on experimental work on the core (and AHL material at HL). Section B contains short-answer and extended-response questions from each of the four options.

Internal assessment (IA) is an internally assessed component of the HL Biology course, and it accounts for 20% of the final grade. It consists of a laboratory report, which is based on a practical investigation carried out by the student. The laboratory report is assessed based on the planning, execution, analysis, and evaluation of the investigation.

In addition to these components, HL Biology students are also required to complete a group 4 project, which is an interdisciplinary project completed in collaboration with students from other subjects in the group 4 (sciences) category.

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IB Biology Internal Assessments (IA)

The IB Biology Internal Assessment (IA) is an essential component, demanding students to conduct an independent scientific investigation to showcase their application of biology concepts. Think Smart Biology tutors are instrumental in guiding students through this intricate process.

They provide support in formulating precise research questions, helping students develop robust methodologies, and offering guidance on the collection and analysis of data. Our tutors play a crucial role in ensuring that students present their findings in a well-structured scientific report that meets IB standards.

With the assistance of Think Smart Biology tutors, students can navigate the complexities of the IA, resulting in a comprehensive and well-executed project that not only aligns with IB expectations but also enhances their understanding of biology concepts.

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Our IB Biology Tutors

All Think Smart Biology tutors have once been in your shoes - they are IB alumni.

They've grappled with the same issues and, as a result, can adapt more effectively than the average IB teacher. This enables us to offer you a personalized IB exam journey.

Our emphasis is on fostering a deep understanding of concepts rather than mere memorization of formulas, especially in the context of IB Biology.

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Express creativity through various mediums, exploring concepts and techniques reflecting the human experience.

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