Good for her!!
DS needs to realize that he is not the smartest person on the planet nor does he know everything. He also needs to respect the opinions and hard work of others.
Its better to learn this now than get crushed when its harder for him to adjust.
A suggestion would be for them to work together to solve a problem, make something, or to find something out.
Another is for each one to make a regular presentation to the other, soemthing you structure to ensure that its NEW material for both of them. Ie. she does Botany and he does Geology. This way they learn to learn from others AND learn how to transmit knowledge as well.
