Sometimes the bright sunny days can be tough. You didnt say that but thats the ideal time to take your kids fishing. You will increase your chances a bit if you fish early and late or on an overcast day.
Productive water is the key. You might have some success with the little guy if you switch to sand worms. They are schoolie magnets and schoolies are active at all hours.
Theres no one way, if I have to get a fish i use sand worms or clam bellies and downsize the hooks.
For the bigger guys I use bigger bait and fish the evening tides.
Paddle tail storms shads work great for me when I cant decide what to throw at them.
In other words its not that easy. You have to put your time in but schoolies are always a blast and easily accessible. look for bogs, eel grass, coves, birds, wooden pilings, rocks, swirls, nervous water. any tell tale signs.
Good luck out there and get out as often as possible.
welcome to the board.