We r delight driven but last few years we've not done much in the way of academics during the summer. It's been a time of enrichment (camps, lessons, and summer stuff) We've done year round for many years and lately we've just needed a big break from structure.
Usually they read 30+ min a day and do some math a few times a week.
Last year my youngest finished all her curriculum in April so she just floated around from May to September having fun.
This year I think the younger two will have math all summer and that's all I know so far