It is for parents to manage their own context as best they can: the capacity for supporting children will vary hugely according to family circumstances.
The government requests that school provides, on average, 3 hours per day for infants and 4 hours per day for junior aged children (Year Three upwards).
Hence, teachers will typically set three activities a day- English, Maths and another subject, they will usually run a couple of zoom meetings which we urge parents to have their children attend, and please, please, encourage the children to cultivate a good reading habit. I would think 15 minutes in the morning and 15 minutes after lunch would be a good start.
Teachers I am sure will share lots of fun websites children could also explore to practise their multiplication tables and so on.
Oak National Academy and BBC Bitesize resources are frequently mentioned in the media. They are accessible here: