Course hub
SBI4U
Biology, Grade 12
Every unit, its expectations, and a lab or lesson you can run in the next period.
The short answer
What are the units and expectations for SBI4U?
SBI4U is Biology, Grade 12, University Preparation: one credit, 110 hours, five strands. The first is Scientific Investigation Skills and Career Exploration, which is assessed through the work rather than taught separately. The other four are the content units you plan around — Biochemistry, Metabolic Processes, Molecular Genetics, and Homeostasis.
Each content unit carries overall expectations, which are the big ideas your unit plan and comments speak to, and specific expectations, the numbered codes like B2.3 that individual lessons and exit questions attach to. The two units where students most often stall are Metabolic Processes, where the rate calculations do the damage, and Molecular Genetics, where the replication fork asks them to hold one enzyme per job in their heads at once. Both have a lab below.
The strands
Five strands, four of them units
A Scientific Investigation Skills and Career Exploration
The skills strand that runs through the whole course: initiating and planning, performing and recording, analysing and interpreting, and communicating. It is assessed inside the content units rather than taught on its own.
B Biochemistry
Structures and properties of biochemical compounds, the cell membrane, and how enzymes work.
C Metabolic Processes
Cellular respiration and photosynthesis, and the rate of enzyme-catalysed reactions.
D Molecular Genetics
DNA replication, protein synthesis, and gene expression.
E Homeostasis
The feedback mechanisms that hold internal conditions steady, including transport and osmoregulation.
Unit by unit
A lab and a write-up for each unit
Each row is one unit, the concept it turns on, and the free lab that makes it visible. Open any lab and it runs in the browser — no account, nothing to install, no equipment to book.
Biochemistry
Structures and properties of biochemical compounds, the bilayer, and how enzymes work.
Metabolic Processes
Rate of enzyme-catalysed reactions, and what temperature, pH and inhibitors do to them.
Molecular Genetics
Semiconservative replication, continuous and discontinuous synthesis, one enzyme per job.
Homeostasis
Membrane transport and osmoregulation as feedback the cell actually runs.
Plans
What each plan costs
The monthly price and the AI allowance it includes. The labs and every write-up above need no plan at all.
Free
$0
10,000 tokens a month
Starter
$14.95/mo
50,000 tokens a month
Pro
$44.95/mo
100,000 tokens a month
Premium
$99.95/mo
250,000 tokens a month
Course questions
SBI4U questions teachers ask
Next
Where to go from here
Faster feedback on lab write-ups
Criteria first, then the rubric: the same judgement in less marking time.
OpenPlan a 75-minute SBI4U period
The timed four-block plan, with the expectation code printed on the handout.
OpenRubric aligned to the achievement chart
Four categories, four levels, one row per criterion you actually assess.
Open