Sorry for going off topic but I would like to say this is a common public misconception. The vast majority of UK woodlands would support more species if they were cut more regularly. Dense thicket stage regrowth supports far more species of flora and fauna than high forest with closed canopy and little light getting to the ground so reduced ground flora and shrub layer. Of course a percentage of old trees left to get very old and rot increases diversity but the average UK woodland with its average trees of 50-150 years old is not necessarily best left. This policy over 100 years led to drastic reduction in diversity in Epping Forest. Each woodland needs analysing, what is special and of value in this place? what do we want to get out of it in the long term?
So back on topic
Oak high tanin content of the heartwood makes it durable and also good strength. Ideal for timber frame buildings, coopered barrels, ships timbers.
Robin, I agree, that all comes under my heading of 'needs to be cut' but telling young kids how to make use of wood if they cut it down without telling them of the benefits of leaving it up is only part of the story. I manage a small wood so am well aware of how much cutting is needed to provide the diversity of habitat for our wild life as well as provide the timber for our use it's just that all the 'uses' were 'cut it and use it'. I have spent the last 16 years thinning and coppicing to get layers in my wood.
And, I would argue, that a discussion on the 'management' of trees should go hand in hand with 'what you can do with it when you've cut it' so not entirely off-topic

Cheers,
Broch