Free printable
Grade 9 Biology, Unit 1: all eight lessons
The first unit of Clareza’s high-school biology course, The Chemistry of Life, as a 61-page PDF. Every lesson has a short script for you to read, a page to read with your teenager, and a practice sheet on its own page so you can copy it. The answers are at the back.
No email, no account. Print it, share it, pass it on, as long as it stays whole.
Download the PDF (1.3 MB)What is in it
- Why water behaves as it does: polarity and hydrogen bonding
- The four families of macromolecule, and what tells them apart
- Building and breaking: dehydration synthesis and hydrolysis
- Protein structure, from the sequence to the folded shape
- Monomers, polymers and what each class does in a living thing
- Enzymes: lowering activation energy by matching shape
- What heat and pH do to an enzyme, and why it stops working
- Why a single swapped amino acid can change everything
The same course online: try a lesson with Clara
Online, Clara, the teacher built into every course, works through each lesson with your teenager and explains a wrong answer instead of marking it. Here is a real one. No account needed.
The whole year
This unit comes from Biology: Systems, Structure and Change, a full high-school biology year written so that a parent who is not a scientist can still run it: each lesson says what to say, what the student reads, and what to look for when they get it wrong. Every one of those lessons is already live online, taught by Clara.
Online, this becomes the full biology course, same lessons, taught instead of printed, alongside the rest of the year. See the whole thing on the Grade 9 curriculum page.
Start 30 days free online →One price for every grade and every child. Nothing is charged before day 30, and you can cancel the same minute you start and still keep all 30 days.