A.D.
Hi T.!
It sounds like your son is very smart and you are doing a great job! You have to remember that in public school much time is taken up with roll-calling, standing in line, giving instructions so that everyone understands, waiting on everyone else to complete the assignment and general classroom management - just because they are there all day is NO indication they are on-task all day! :~)
In your homeschool, all of your time is devoted to one child, and that child can move at his own pace without waiting for others to complete the task.
I have homeschooled for 6 years now. My kindergartener spent no more than 2 hours a day on lessons, but I did make sure she had plenty of opportunity for imaginative play and time out of doors, both are VERY important at this age. Children need to make real connections with their environments and that is done hands-on and not through workbooks.
I recommend John Holt's book "Learning All the Time" and also SimplyCharlotteMason.com
My youngest (who did kindergarten 2 hours a day) is now in 4th grade and we school about 4 hours a day. Her reading level is 6th grade and she does very well in all of her subjects.
If your son isn't interested in paper/cut/glue type arts and crafts, try giving him something "real" to learn, like Knot-tying, or soap carving, or clay modeling, or building small things out of wood, or bead-stringing, or hand-sewing felt animals. Let him make something real and lasting - something useful and that won't just be thrown away in a few days.
I use Ambleside Online curriculum. Here is a quote...
". . . the chief function of the child--his business in the world during the first six or seven years of his life--is to find out all he can, about whatever comes under his notice, by means of his five senses; that he has an insatiable appetite for knowledge got in this way; and that, therefore, the endeavour of his parents should be to put him in the way of making acquaintance freely with Nature and natural objects." Charlotte Mason (Volume 1, Home Education, pg. 96)
Here is a link to the Year 0 curriculum...
http://www.amblesideonline.org/00.shtml
I'm sorry if this is random, I don't have much time this morning for online activities, but I did want to let you know that it is not at all necessary to spend more than 2 hours a day on kindergarten "seat-work".
Enjoy your homeschooling journey!!!
A. :~D