4 classes · first lesson of each free
Science
How things work, not just what they are called. Physics, chemistry, biology and earth science, explained as processes, not just definitions.
Science
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class.
Open a class to see its lessons. Each lesson is a short read with a worked example and three practice questions. Lesson 1 of every class is free.
The first lesson of every class is free. Vidi Pro opens every lesson in every subject.See Vidi Pro