All the same, these letters give a basic education (3,5,2)

I believe the answer is:

the three rs

'a basic education' is the definition.
(the three R's are reading, writing and arithmetic)

'all the same these letters' is the wordplay.
I cannot really see how this works, but
an anagram of 'the' is 'het' which is present in the answer.
The remaining letters 'threers' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

'give' acts as a link.

(Another definition for the three rs that I've seen is " It's kids' stuff".)

I've seen this clue in The Guardian.

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