So you expect more from your own kids than you do from those you teach?
This is actually a very good point.
I was recently reading a discussion among my local mothers about preschool and kindergarten (I live in a country where school starts at 6 and kindy is not governed by any particular rules, so it varies widely).
Some of the mothers (several of whom also worked in kindies) were absolute vehement that KINDY SHOULD BE ABOUT PLAY ONLY, PLAY PLAY PLAY and were remarkably sarcastic about kindergartens that spent even a small amount of time each day doing a little bit of literacy and number work.
Yet most of these mothers alsowhen they were askedsaid that they had taught their own children some basics of literacy and numeracy before starting school. I found it quite odd that they didn't seem to think there was anything strange about what they were essentially implying--that small amounts of literacy and numeracy are evil when done in a group-care setting but are acceptable if done at home with a parent.
It also raises questions about social equality. If middle class people quietly teach their own kids the basics at home while insisting that publically funded preschools and kindergartens must NOT do so, there is a case for saying that this is going to exacerbate social inequalities. Young, poor, weakly educated and/or non-English speaking parents are a lot less likely to have the knowledge, confidence or organization to do this kind of stuff with their kids at home, so this is potentially going to increase gaps among children starting school based on their socioeconomic background.