My boys are in 3rd and 4th grades this year (our first year homeschooling). We do the following:
math (Saxon 3 and 5/4) 4 days a week
spelling (spelling power) 4 days a week
SOTW 3 days a week
Prima Latina 4 days a week
Wordly Wise (vocab) 3 days a week
Grammar (FLL) 3 days a week
Writing (WWE) 4 days a week
Cursive 2-3 days a week
Science 3 days a week
We are also doing a mish-mash of atlas work (geography) a few days a week
drawing with children (art)- once a week
learning about the orchestra- once a week
We do school 4 days a week and use the 5th day for nature walks, experiments, history projects, etc. Most days take us about 4-5 hours or so a day. They also practice piano 30 minutes each day.
They do history, science, grammar, writing, and latin together. They do separate math, spelling and vocabulary. I would try to combine as much as is possible to help cut down on time. Also, they pretty much do vocab, atlas, cursive on their own (i.e. while one is finishing math or spelling, the other will do piano and then work on vocab, cursive or their atlas work for a while).
HTH. I'm new to this, so I don't even know if this is the best way to do things, but it's working for us so far. Good luck.
Jodie