Online tutoring for Grade 11 and 12 Biology (SBI3U, SBI4U)

Biology is more than a vocabulary list. Grade 11 lays down genetics and body systems, and grade 12 adds the chemistry of life. Your child works through biology questions 1-on-1 with a teacher, online.

Book a free trial lesson

Who this is for

Grade 11 students taking SBI3U, at school or online
Grade 12 students in SBI4U who find metabolism or molecular genetics hard to keep straight
Students aiming at university life science, health science, nursing or kinesiology programs that ask for SBI4U
Parents who want a short written log after every lesson

Biology (SBI3U)

Grade 11 · Prerequisite: SNC2D (Grade 10 Academic Science)

Diversity of Living Things

Classification and taxonomy, from domains to species
Dichotomous keys and phylogenetic trees
Viruses, bacteria, protists and fungi
Structural features of plant and animal groups

Evolution

Natural selection and the evidence for evolution
Mechanisms of evolutionary change: mutation, gene flow and genetic drift
Speciation and adaptive radiation
Patterns of evolution, such as convergent and divergent evolution

Genetic Processes

Meiosis and gamete formation
Mendelian inheritance and Punnett squares
Incomplete dominance, codominance and sex-linked traits
Genetic technologies and their implications

Animals: Structure and Function

The digestive system
The respiratory system and gas exchange
The circulatory system and blood
Disorders of these systems and how they are treated

Plants: Anatomy, Growth, and Function

Plant tissues, roots, stems and leaves
Transport of water and sugars in xylem and phloem
Plant hormones and tropisms
Sexual and asexual reproduction in plants

Biology (SBI4U)

Grade 12 · Prerequisite: SBI3U (Grade 11 Biology)

Biochemistry

Functional groups and the four classes of biological molecules
Enzyme structure, function and inhibition
The cell membrane and transport across it
Dehydration synthesis and hydrolysis

Metabolic Processes

Glycolysis, the Krebs cycle and the electron transport chain
ATP yield and chemiosmosis
The light-dependent and light-independent reactions of photosynthesis
Fermentation

Molecular Genetics

DNA structure and semi-conservative replication
Transcription and translation
Gene regulation, including the lac and trp operons
Mutations and biotechnology techniques

Homeostasis

Negative and positive feedback
The endocrine system and hormones
The nervous system and nerve impulses
The excretory system and the nephron

Population Dynamics

Exponential and logistic growth models
Carrying capacity and limiting factors
Interactions between species
Human population growth and its effect on ecosystems

From SBI3U to SBI4U

Grade 12 Biology picks up the genetics from grade 11 and expects students to already know cell structure and some basic chemistry. Molecular genetics and biochemistry build straight on top of them.

The first SBI4U lessons check those foundations with questions, and anything missing is fixed before the new material rests on it.

Where students get stuck in Biology

Non-Mendelian and sex-linked genetics problems
Codominance, incomplete dominance and X-linked traits each change how a Punnett square is set up. Students who apply the simple dominant-recessive pattern to every cross lose the marks on the ratios.
Body systems questions that need cause and effect
Grade 11 tests ask how the digestive, respiratory and circulatory systems work together and what a disorder changes. Listing organs is not enough; the answer has to trace what happens step by step.
Cellular respiration and its energy accounting
Glycolysis, the Krebs cycle and the electron transport chain each make different amounts of ATP, NADH and FADH2, in different places in the cell. Losing track of which stage makes what costs marks on every tally question.
Photosynthesis and how it mirrors respiration
The light-dependent and light-independent reactions run in different parts of the chloroplast and feed each other. Students mix up inputs and outputs, especially when a question compares photosynthesis with respiration.
DNA replication, transcription, translation and gene regulation
Each process has its own enzymes, direction and start and stop signals. Operon questions then ask students to predict what happens when a repressor or inducer is present, which takes the whole sequence held in mind.
Feedback loops in homeostasis
Hormone control and the nephron are tested as chains: a change, a sensor, a signal, a response. Missing one link, or calling a positive feedback loop negative, turns a full answer into a partial one.

How we teach Biology

Biology lessons are built around the long-answer and diagram questions tests use, so your child practises explaining processes, not only memorising terms.
We keep a biology mistakes blueprint, such as swapped stages in respiration or a skipped link in a feedback loop, and spend practice on the ones still showing up.
You receive a written log within 24 hours of every lesson with what was taught, the latest test result, and what the next lesson starts with.
Students can preview SBI4U over the summer, so the first time they meet metabolism or molecular genetics is not in a September classroom.

How we teach

The method behind the marks

Four things every lesson is built on.

01
Run the course before the course
A grade 12 course taught front to back the summer before, so the school year is the student's second pass, not their first. Four courses in one summer is possible; one is the usual.
02
Lessons are problems, not lectures
Every lesson is the student doing questions with a teacher beside them. A topic is finished when the student completes the set without instruction, not when it has been explained.
03
The mistakes blueprint
For each course we keep a map of every mistake a student can make on it. Practice targets the ones the student has not cleared yet, before one of them costs a mark that stays on the transcript.
04
Logged within 24 hours
After every lesson the teacher logs what was covered, the latest test score, a confidence rating out of five, and where the next lesson starts. Written the same day, while it is still fresh.

The roster

From the lesson log

Students with a logged test in this subject, read straight off the lesson log. Every lesson is logged within 24 hours, in the teachers' own words. Students are shown by number and initials only.

Student 14
L.
Grade 12 Biology (SBI4U) · Grade 12 Chemistry (SCH4U) · Grade 12 English (ENG4U)
Grade 12
94%
SBI4U · Oct 28
from 78 on Sep 29
Biology is on enzymes: structure, competitive and non-competitive inhibition, and the effect of temperature and pH. She answered the application questions well and is now writing up an enzyme rate-of-reaction lab. English essay support runs alongside.
Logged Nov 6, 2026
16 lessons logged · since September 2026

Updated November 10, 2026

5.0 / 5

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Offers

Two ways to work with us

During the school year

1-on-1 tutoring

$60 / hour

Your first lesson is free.

One student, one instructor, one plan. Grade 11 and 12 math, physics, chemistry and biology, online and live.

Weekly, twice weekly, or ahead of a test
Every lesson logged within 24 hours
Stop any time, no packages

Book a free trial lesson

Before the school year

The course intensive

$600 / subject

Start with lesson 1 for $70.

One grade 12 course front to back in 10 lessons, Monday to Friday over two weeks, before the student takes it for marks.

10 lessons, 1 hour each, same time daily
95+ on our final, or we keep teaching free
Advanced Functions, Calculus, Physics, Chemistry

See the intensive

FAQ

Frequently Asked Questions

What parents ask about Biology tutoring before booking.

Biology feels like pure memorisation. How do you teach it?

Terms matter, but tests reward explaining how a process works and why. We practise those explanations with real test questions until your child can write them without notes.

Can you help with SBI4U genetics and metabolism before a unit test?

Yes. Ahead of a unit test we go through the questions that unit usually asks, find where your child slips, and practise those until they come out right.

Can you tutor SBI3U and SBI4U in the same year?

Yes. When a student takes both biology courses in one school year, lessons follow the course that is running and fill in grade 11 material the moment grade 12 calls for it.

Are the SBI4U study decks free?

Yes. Our study library has free flashcards and chapter self-tests for some Grade 12 Biology chapters, with no account needed. More chapters are added over time.

Start with a free trial lesson

One lesson, one teacher, on the unit your child is on now. You get the lesson log the same day.

Book a free trial lesson

Online tutoring for Grade 11 and 12 Biology (SBI3U, SBI4U)

Who this is for

Biology (SBI3U)

Diversity of Living Things

Evolution

Genetic Processes

Animals: Structure and Function

Plants: Anatomy, Growth, and Function

Biology (SBI4U)

Biochemistry

Metabolic Processes

Molecular Genetics

Homeostasis

Population Dynamics

From SBI3U to SBI4U

Where students get stuck in Biology

Non-Mendelian and sex-linked genetics problems

Body systems questions that need cause and effect

Cellular respiration and its energy accounting

Photosynthesis and how it mirrors respiration

DNA replication, transcription, translation and gene regulation

Feedback loops in homeostasis

How we teach Biology

The method behind the marks

Run the course before the course

Lessons are problems, not lectures

The mistakes blueprint

Logged within 24 hours

From the lesson log

Two ways to work with us

1-on-1 tutoring

The course intensive

Frequently Asked Questions

Related

Start with a free trial lesson