I don't have a routine, but some moms "need" it and some kids thrive on it.
What I found works well for us (my kids are 6 & 4), is to turn everyday activities into learning activities; to make it fun, engaging, and interesting; and to teach them what they're interested in. To teach them their letters, I would read them all sorts of "alphabet" books, like "Dr. Seuss's ABC's", and play with the refrigerator magnets, and stuff like that. For numbers and math, we might count the towels as we fold them, or make a recipe of something and count the cups of flour or teaspoons of sugar as we add them to the mixture.
I do have some workbooks, and the kids enjoy doing them; but we still don't "do school" every day, unless the kids want to. I got a kindergarten workbook last year (my kids were 5 and almost-4), and they completed it in one week. They were so taken with this workbook that they did a third of it (something like 100 pages) the first day, until finally *I* demanded a break because my brain was tired. ;-)
Different kids learn different things at different times. My 4-y/o is better that my 6-y/o in a lot of things, just because he seems to have the penchant for that thing, or has a brain that allows him to process this thing better; but of course my 6-y/o is better than my 4-y/o in a lot of other things. My sister's kids are 2 years apart in age, and her younger child (about the age of 4-5) was reading, and reading well, even though her older child (about 6-7) was struggling with reading. Then, almost like a light-switch flipped on, in a very short time, the older child just "got it," and went from barely reading, and disliking to read, to being a voracious reader when she was 8 or nearly 8.