I only had to "make" mine go into the coop thefirst night. But I do have one who likes to hang out in the dark long after the others have called it a night. But eventually she, too, heads inside and settles down.
Try this:
*Don't keep them stirred up by checking and rechecking whether they've gone in if it hasn't gotten dark enough for them to want to go inside. They operate by light, not the clock.
*Make sure they have comfortable and adequate roositng space and height in the coop.
*Paint the inside white so it doesn't look so dark.
*Add a small night light to attract them in and then shut it off once they are inside.
*Toss a super yummy treat inside the coop just as it's getting pretty dark and then shut them in once they scarf it down.