On scroll animate items in using tweenmax and scrollmagic. Apply an ID to the div (can use rand() + something else) Add class of .animated to that div. Voila
var controller = new ScrollMagic.Controller();
$('.animated').each(function () {
_this = $(this);
_thisId = _this.attr('id');
_trigger = '#' + _thisId;
_offset = $(this).outerHeight() / 3 + 100;
var scene = new ScrollMagic.Scene({
triggerElement: _trigger,
triggerHook: "onEnter",
offset: 75,
duration: 0,
reverse: true,
}).setTween(_trigger, .5, {
opacity: '1',
ease: Power0.easeOut,
delay: 1
}).addTo(controller);
});