Curriculum

Alpha Omega's Switched on Schoolhouse
For History and English (Spelling is included thru 8th grade), we use Alpha Omega's SOS (similar to LifePacs, but on the computer).  JohnDavid and Bethany are also using SOS Science and Bible, but will be switching to Apologia science this fall.  Subjects are taught with a Creation- and Bible-based viewpoint throughout the lessons.
Lessons or individual questions can be reset to be done over.  Curriculum is reusable, and each grade can accommodate up to 5 children at a time.
All lessons, quizzes, and tests can be done on the computer, and are graded automatically.  All can be printed.
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Apologia Science
I've just recently discovered this science, and am so excited. Apologia Science for Jr. High and High School is written by a scientist, Dr. Jay Wile, especially for homeschoolers, and for those whose parents may not know a whole lot about science.  (that's me!)

 There is a toll-free number that students can call if they need help.  They'll be transferred to the correct teacher.  =)
Apologia science is written in a conversational way for the student to understand, so there is no teacher book.  I especially love that he thoroughly explains the experiments and what they are intended to teach.  After 3 days, my 9^th grade daughter said she no longer dreads science.  YEAH!!! 
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Bob Jones
Since I used ABeka for most of my schooling, (used ACE for 4th - 6th?), we started out using ABeka for Rebekah for grades K - 2nd, then in 3rd grade, we switched to Bob Jones Math. She did try SOS math in 6th grade (no Teacher's Manual - I need one, or at least a solution key), then we switched back.  
JohnDavid and Bethany have always used Bob Jones math.
Some say BJ math uses a mastery approach, but it is actually more like a slow spiral.  Each chapter centers on one concept, building in difficulty to the end of the chapter. There are subsequent chapters later in the book that go back and deal w/ certain concepts, long division, etc., more in depth. But within one chapter, there are no new concepts introduced, or going too fast as I felt ABeka did.  At least, it was too fast for us.
Bob Jones uses manipulatives and teaches more for understanding before teaching memorization of facts.
Rebekah started understanding and remembering concepts much better. 
There is a little review in the main workbook, and there are a few 'more-in-depth' chapters that reinforce later in the text.  Review books are also available.  I don't think it is too much work to do both the main workbook and the review book, since there are fewer problems in the regular lesson than there are in ABeka, and way fewer than in Saxon.  But each lesson in BJU is about one type of problem or concept.  So there doesn't need to be as many as there are in ABeka and Saxon, which include the review in the lesson.  
ETA:  For highschool, I don't use review books.  The lessons are divided into 3 "tracks" -- minimum, average, and maximum, and the problems are not all completed in each lesson -- just the ones for the track your child is taking.  There is, however, a cumulative review in each lesson.
I do mark in pencil the problems my daughter does, and if further review is needed, I will draw from the uncompleted problems.
The difference is that BJU is a much slower spiral than ABeka and Saxon.  At least 2 of my kids really need to take their time when learning anything new.  This has worked for us, and the learning started to stick much better when we switched over.  My kids rarely need help w/ the review book.
That said, I do think at least one of my children would do fine w/ either ABeka or BJU, but 2 out of 3 do better w/ BJU, so that's what works for us.  
 

Rebekah is using Bob Jones Bible this year.  I have not decided for this coming fall.
She really loves it.  History and Bible are her favorite subjects, and I'll go by her room and see her still with her Bible, an hour and a half after she started!  She's even come thru the living room to get one of Travis' commentaries to look up something.  =)
I'll be letting her continue with Bob Jones Bible.

JohnDavid has dyslexia, and is a little behind in English, and is not quite ready for SOS.  I want him to get more basics (parts of speech, grammar, punctuation, etc.) before going on.  SOS, at least from 6th grade up, has a lot of writing, and only some of the basics.
I'm using Bob Jones English and Easy Grammar for him right now.
1/3/11 We are now using SOS Language, and have combined different units from 6th, 7th, and 8th to target what he needs to learn. 

Easy Grammar
Both girls did a year with Easy Grammar (2 pages a day) along with doing SOS, and I will have JohnDavid do it at least another year.  Easy Grammar teaches to recognize prepositions first, then prepositional phrases, and to draw a line through that part of the sentence.  When subjects and verbs are introduced, since they have learned to eliminate the Prepositional Phrase, it is easier to locate the S & V.  Throughout the book, PP's are eliminated first in nearly every exercise, making it easier to break down the sentence. 
Last year, we had been doing EG a few months when the kids took their achievement tests.  Bethany said she knew exactly what an adverb was because of what she'd learned from EG.  (you mean she didn't learn this before?  Yes, she just kept forgetting!)
EG has several pages on the same part of speech before introducing a new one.  Periodically, there is a section with about 6 - 8 pages of review.
A lower grade will have more pages per part of speech before a new one is introduced, so choose what your child needs, not what grade they're in.
Video Presentation

Spelling
Bethany uses SOS, and practices daily with games using SpellingCity where I've entered her spelling words.  She Retests on all the missed words on Test Me until they are all correct.  See her current lesson here.

JohnDavid uses Sequential Spelling, written by a dyslexic for children with dyslexia.  The numbers on the fronts of the books are not grade levels.  We use the book,  but I would love to have the $$ to purchase the CD-Rom.

Rebekah, 9th gr, doesn't have spelling anymore w/ SOS, so we got WordlyWise for her. Excellent for building vocabulary! This is the link to the online lists (pronounces words aloud, and sentences) and games, but we also bought the student book which has 5 days of lessons for each list.  It's advanced, so we got level 7 for her.

Rebekah did ABeka health this year.  I was able to get 2 used books for $10 each (for the twins for later), and she and her cousin A made their own tests.  They learned it better that way!  Ten questions each, and as I typed them up, I added a few to make it 25.  They weren't allowed to see the other's questions beforehand, but rarely did they come up with the same ones.
ABeka health covers safety, first aid, disease prevention, and the different body systems.  ABeka is a Christian curriculum, and their health teaches that God is our Creator, and we should take care of our bodies.  We should control our emotions (Proverbs 25:28), and that this is important for good health.   Because our bodies are the temple of the Holy Spirit (I Corinthians 6:19-20), ABeka teaches against drug abuse, tobacco, and alcohol.

The Learnables Spanish
Rebekah is using it this year, and I LOVE IT! It's an immersion way of teaching. You see pictures and hear the words/phrases, and after only a few days, you really do see the picture in your mind when you hear the words! No speaking, so you won't mispronounce. After all, that's the way babies learn their native language. Just listening for awhile.
The reading comes about halfway through the year.
The online example doesn't do justice in my opinion. It doesn't last long enough for you to get the fact that the pics really do come to mind.
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So that's what we use, and each year, I end up making slight changes here and there.  But that's the way homeschooling goes.  You find out what works best for your children, and tailor to their needs.  =)