Hiya, from my perspective benchmarks are practices,things you do/ setting does that you've found work best for you, all and everyone around you.
They are what tend to change and evolve when embedding information .. but are what you can return to if something fails.
One basic example could be cup washing - at home or in work.
Best practice may be to wash cups, dry and stack them for use.
By knowing why this is a best practice can give it a bench mark status - extremes of which could be taking a dirty cup - rinsing and using it there and then. Not washing it at all or taking a cleaned, dried and stacked cup and washing/rinsing it again.
The bench mark becomes the measurement against which you match other practices / actions against.
Finding the balance in a practice is what forms the benchmark - and may be personal preference, ie: you don't mind which or any way you recieve a cup & drink, found that you needed to wash a dried, stacked a cup again or it can be group policy which may give guidance to ensure other reasons - eg: health & safety. It can become complicated and hard to identify a benchmark in this respect as it will also be named as a procedure or setting commitment and benchmarks can be the smallest or largest examples of practices - tieing a shoelace, environmental cleaning regime, having tissues nearby, settings philosophical approach, putting playdough out every/every other day, partnerships - what's involved by the word benchmark can also depend on how organisations/individuals represent their work and its obligations/commitments.
Benchmarking from wikipedia
Best practice working in partnership with Parents from Hants.gov.uk
What best practice looks like from Ofsted - I feel the last bulleted point is incorrect and knowledge should be used in place of records .. but that's personal
lol
I hope this helps
xx