Well that took some digging out! Out of all the Mumsnet threads about Badenoch there were a handful of posts that basically said no more than you did about education, with no details and no citations.
One post mentioned her Leadership Campaign launch speech so I have tracked it down to this quote in The Guardian:
Culture warrior Kemi Badenoch is already a winner with Tory right
13 July 2022
"Her official campaign speech on Tuesday stressed her desire for “free markets [and] limited government”, promising that an administration led by her would “discard the priorities of Twitter”.
As with most speeches, there were few specifics, but what ideas for waste-trimming it did contain might be difficult to put into practice, for example the idea that money could be saved by taking resources from “superfluous support staff and peripheral activities” in schools."
https://www.theguardian.com/politics/2022/jul/13/kemi-badenoch-tory-leadership-culture-wars
There was a letter in response on 14 July:
Nick Toms is worried by Kemi Badenoch’s idea to cut down on support staff in schools
As the former chair of governors at Jubilee primary school, where Kemi Badenoch was a governor, I am shocked that she can say resources can be saved from “superfluous support staff and peripheral activities” in schools (Culture warrior Kemi Badenoch is already a winner with Tory right, 13 July).
As she will know from her time at the school, which serves some of the most deprived parts of Brixton, south London, there are no superfluous support staff. Teaching assistants play a vital role in aiding teachers in classes where many of the children come from highly disadvantaged backgrounds and need all the help they can get. Some are allocated to specific children as part of their educational needs assessment. There are no unnecessary office staff.
I do not know what she means by peripheral activities. If she means depriving children of sport or music opportunities, then that is shameful. To my recollection, at no point during her time as a governor did Ms Badenoch ever propose cuts in staff or activities for our children. She knew then that it would be unacceptable. It’s even more wrong now, when state schools are struggling for funds following Covid, with much already cut to the bone.
Ms Badenoch’s position is surprising for someone who was equalities minister. Cuts of this sort would inevitably lead to a widening of the gulf between the poorest in our society and those who attend private schools. Ms Badenoch’s war on woke appears to mean a war on some of the most underprivileged and vulnerable in our society for her own political and personal gain.
Nick Toms
Brixton, London
I wasn't able to find any more details about what exactly she meant and searched Twitter for her Twitter handle plus "superfluous".
The only thing of note that turned up, ie. factual rather than abuse or just "I disagree" type tweets, backs her up:
Thread by Solomon Kingsnorth:
https://twitter.com/solomon_teach/status/1546962764010340352
which links to a chapter from this book:
Bad Education: Debunking Myths in Education
https://www.mheducation.co.uk/bad-education-debunking-myths-in-education-9780335246014-emea-group#tab-label-product-description-title
Chapter 5
Supporting learning?: How effective are teaching assistants?
Rob Webster and Peter Blatchford
https://maximisingtas.co.uk/assets/content/bad-education-tas-chapter.pdf
The Chapter is hosted on this website:
Maximising the Impact of Teaching Assistants
https://maximisingtas.co.uk/research.php
The MITA approach has been independently evaluated, completed April 2023:
Training and support for heads, teachers and teaching assistants on how to use TAs in the classroom
https://educationendowmentfoundation.org.uk/projects-and-evaluation/projects/maximising-the-impact-of-teaching-assistants
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The basic argument, from skimming that lot, seems to be:
> simply increasing the number of TAs proportional to Teachers has resulted in poorer educational outcomes
> Teachers agree with this evaluation
> there would be better outcomes from better training, deployment and support of fewer TA's
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Solomon Kingsnorth is a pseudonym. The writer is a primary school teacher who blogs on education policy
https://www.theguardian.com/profile/solomon-kingsnorth