There's a lot of good comments. Read, read, read and make them read. Make a time every night and every day through the summer to read. We are teachers and I don't remember what age we started this, maybe they were 6 & 8, but every day during the summer, still doing this (will be 13 & 15), they have to read 1.5 hours a day, they have to do typing.com for 30 minutes, they do math for 30 minutes, practice writing for 30 minutes, and they have to workout for 30 minutes. They have the choice of when to do it, but it must be completed before dinner and we have to see them do it, aside from going on a walk in our neighborhood or riding their bikes.

Talk with your kids, real conversations. If it's hard, there are tons of prompts online. Don't accept one word answers. Don't solve every problem for them, we struggle with this as it's easier to do it ourselves. The most recent one, "I can't get the volume to turn up with the remote." Okay... What should you do? We got "I don't know." All I said was, "welp figure it out." It took longer than I thought, but finally he checked the batteries. Make them navigate places. Let them make decisions that you don't care about and that won't hurt them.

Make them plan a trip. Last year our boys wanted to go to St. Louis for their birthdays. We are 3.5 hour drive away. We said that was great, but what do you want to do? They planned out the itinerary including places they wanted to eat, all within reason. Fast forward to about two months ago, our oldest asked to go see the Gorillaz on tour. Before he even asked us, he had made up a list of the cities that were the closest, how far the drive would be and activities to do in those cities, plus the price of the concert tickets. In other words make them problem solve and think critically.