At 6 & 8 you could combine science, social studies, art, music, health, PE, etc. you can have each do some of the subjects together by asking them different questions according to their grade level during class time or giving them slightly different projects to complete. not sure what you are using for all these but let's take science for example, you want to do a unit on magnets, you could read about them which should only take 5 mins then do something w/ them like an "experiment" have a bunch of objects set out then have your kids make a hypothesis of which will be picked up by the magnet and then have them test it out, this should take 10 mins or so and then The 8 yr old can also maybe read a small nonfiction text of where we may use magnets in everyday life and then write a 3 sentence blurb of something in the home that uses a magnet. And science is now done for the week! Do this for the rest of the "side subjects" make sure you aren't trying to do them all daily. With Your core subjects like math, reading, writing, grammar, phonics - I usually do these daily but your total schooling it shouldn't take more than 3-4 hrs depending on what you've got scheduled and how long they work independently on something You could break it up and do the dailies in the morning and 1 extra subject in the afternoon giving you a 2 hour break in the middle around lunch. I do a math lesson w/ 1 while the other works on a worksheet or some kind of learning game. The lesson should not take more than 15-20 mins at this age. Then they switch. On Friday we just play a few math games like "store" - my 5 yr old gets to buy things and has to count out money and then the 8 yr old will add it all up of what she owes and then I give the 8 yr old a little extra work by asking how much change they will get back if this amount was given. We use AAS too so Monday I introduce the word list and concept and this takes no more than 10 mins, then they do a spelling activity on their own, tues - thurs is a quick 5 min review of the concept and they complete a spelling activity each day and fri is a test. Reading is the same, for my 8 yr old I have a reading curriculum that I do twice/week w/ her for about 15 mins, then I have her work on some type of project like a book report but I have a ton of different ways for her to present the report for her to choose from (check out Pinterest) and she has 2 weeks to complete it. With the 5 yr old I have a 5-10 min lesson phonics session daily and then she gets to pick out a book that she wants to read and she reads for 5 mins aloud to me ( you could even do this at bedtime!) Art - I teach them the same concept but have them complete slightly different projects since they are at diff levels of producing what is asked of them, but it's once a week if your state doesn't mandate how much/week something is taught- heck you could even make it just twice a month that's the beauty of homeschool! I hope this gives you kind of an idea of how to group things to save you some time.