See also this post on Knowledge Organisers which includes links to resources and very importantly the use of knowledge organisers.
For A complete set of A Level Statistics and Mechanics Knowledge Organisers – see these resources from Lucyjc. These resources are available free on TES Resources: Statistics and Mechanics. All include Key Words and Definitions and What Do I Need to Know sections.
And for Pure Mathematics, we have from @misschakera a set for the first year of A Level.
I have added all these very attractively presented resources to this post on Knowledge Organisers which includes links to resources and very importantly the use of knowledge organisers.