'This too ignores Marx's relating of the development of science and technology to "the development of the human mind" which he in turn has occurring within the successive forms of the labour process treated as "schools."'
For which I am glad. Your preoccupation with making this point is not just tedious, but fruitless. You make it again and again. And it goes nowhere. You are arrested at some point in Marx's working out of his philosophy that is between Hegelianism and Marxism, but fail to understand that Marx subsumes Hegel's overriding preoccupation with mind and makes it a subclause in Marx's materialist conception of history.
The development of the mind is an issue, it is just not the most important - except to you. To Marx the most important is the diminution of the realm of necessity, by abbreviating the labour process, and the consequent expansion of the (potential) realm of freedom.