We are pretty eclectic but have a classical bend. That said, we really only parent-direct 3 basic subjects: language arts (which I realize can encompass a lot), math, and history. From there, it's much more child-led (both of my older two boys want to learn about reptiles, so we'll do a month-long unit on them probably once the holidays have passed as this month is already nearing it's second week). That said, I try to get to two of the above 3 subjects at leat 4 times a week. If the baby was older and/or if ds#2 was done with speech therapy (2x a week), we'd probably be able to actually do at least 2 of the 3 subjects every day. But, for now, we try ...
So, for language arts, we do a reading lesson from The Ordinary Parent's Guide to Teaching Reading and a language lesson from Language Lessons for the Well Trained Mind. For math, we'll do a couple pages from Singapore or do some pattern block puzzles or play with the unifix cubes or such. And for history, we are using History Oddessey (I never spell that correctly
), so we usually take a week to do one of the lessons. In all, we probably do at most 1 1/2 hours of focused, structured learning; some days it's probably closer to 1 hour. For dh and I, we like giving the boys (and really for now, it's mostly the 6 year old; sometimes the 4 year old will ask to do some "school" and sometimes he just listens when I'm reading out loud and otherwise plays during his older brother's lessons) a lot of free time to play, explore and just be a kid. But, we also want to have some structure in their day to establish a strong foundation in math, language arts, and history.
In terms of meeting various levels, there are many times ds#2 (4 yo) wants to do whatever project or activity ds#1 is doing for history. Honestly, I just modify it enough so that he can be successful while giving him the feeling of being "grown up" like his brother. For me, hs'ing multiple ages (even though mine are still young), I think it's important to find subjects (like history, science, art, etc) that can be taught together with simple age-appropriate modification, and keep separate on those things that really require it (reading, writing and math).