I homeschool our two elementary-aged daughters while our 4 year old attends a morning preschool (we feel like his age is important for socialized learning then he’ll join us at home for kindergarten next year).

I selected different curriculum for each subject based on content and model. I prepare for each week over the weekend to keep my school days focused on teaching and engaging with them.

To answer your question:
We attend a co-op program all day on Mondays allowing the girls to learn in a group setting from other adults while I teach an older cohort.
Then Tuesday to Friday we school at home usually just 9-12:30 (if they remain focused and diligent). Afternoons are open for music lessons, play dates, and a fun group that focuses on outdoor skills and activities.

If one of them has had difficulty completing their tasks due to lack of focus or if their assignments were particularly challenging either I or my husband will set aside some time in the evening or weekend to help them catch up. (I’ll be helping with multi-digit multiplication algorithms this afternoon with my eldest.)

As far as sustaining energy each day… I certainly am tired at the end of days. The more open afternoons do help and I make sure to get some quiet time while the kids play with each other or are at their afternoon activities…

I'm just getting started with my 5yo. It's mostly play based but we do a little reading and writing every morning. The writing is a struggle, but the reading is coming along well as he's interested in it.

After reading & writing we go out to play for a few hours, often in homeschooling groups or to the pool or skatepark.

In the afternoon we might do a little maths or some art and craft.

Here at home, we start the day before. My wife prepares what she's going to teach my son the night before—whether it's language arts, math, or just reading aloud. So in the morning, when the children wake up, usually around 7:00 a.m., she gives them breakfast, and then they play for a while. Around 8:00 a.m., I go into my room to work, and she reads to him a bit or starts doing some exercises with him. Right now, she's introducing the letters; she's already taught him the vowels and the letter F. Today she started the letter V. She's also doing math, teaching him numbers and how to write them.

That takes no more than 30 minutes. Then she almost always reads them a book of chapters and helps him memorize a Bible verse and a poem. All of that takes about an hour and a half. After that, they play again for the rest of the morning until lunchtime.

In the afternoons he goes to the church school, where he interacts with other children and also improves his Portuguese with native teachers.