Practise the Ontario G1 knowledge test by topic — road-sign recognition and rules of the road — or take an untimed mock exam. Free, and written from the official Handbook.
Practise recognising Ontario road signs and what each one requires you to do, one test group at a time.
Practise the rules of the road: right of way, speed limits, alcohol and drugs, and driving in poor conditions.
A 20-sign, 20-rule mock exam, untimed — the real knowledge test has no timer either.
Aurora is not an official government product. The official Ontario Driver's Handbook is the authoritative source.