Oh, and to help you on the schooling front, each state has it's own set of standards per grade. It will tell you what key areas students in her grade level are working on and what the focus areas are. I'm pretty sure it'll come up on Google (what doesn't???

).
Also, I agree 100% with Roni, she needs to be independently reading EVERY DAY (20 minutes is a good goal) and then doing some type of comprehension activity in conjunction with it (which means you're going to have to read the book, too, mom LOL). She also needs to be writing every day (which can go along with her comprehension activity) and at the fourth grade level (meaning spelling, punctuation, etc... needs to be completed at her skill level - ie: at this grade she should not be misspelling lower-level sight words, you know?). As for math, a great website is
rainforestmath.com Another math activity (and I know some HS aren't for this method, but it's easy for you until you get your HS footing and some things are good on a route memorization level) is do Mad Math Minutes. At this level, she should be able to easily do multiplication and division through 12. Here's a worksheet generator (you may even be able to do it directly on the site, I'm not certain)
http://www.woodlands-junior.kent.sch...hs/worksheets/
If it were me (I'm speaking as a teacher, not a HS), and I were HS a fourth grader, I would be spending a minimum of three hours a day on guided lessons (broken into two or three sessions). This isn't three hours of you talking, but rather you guiding and instructing and then allowing her time to work and absorb. I'd then say, she should have another 30 minutes or so of "homework" where she has independent goals to reach. If you're not doing this now, IMO, you need to get going toward that goal ASAP - espicailly since you say she's behind. If the schools somehow failed her, then this is the time to get her caught up (plus, if you have something in hand to show active schooling, you ex doesn't have the ammo he thinks he does

).
Again, GL!