Parent Involvment

How do you feel about Parents in the classroom?
I think that parents in the classroom are a great concept and in theory would be a great non monetary contribution. I do however feel that sometimes allowing parents to be too involved in the classroomcan distract the student from their learning environment.
How were my parents involved?
My parents were the working parents. My mom would come on my birthday and both my parents would come to sporting events, but I can not think of a single time that my parents volunteered within the classroom or school district.
How would I be involved as a parent?
I am the parent of a 2nd grader at Anne K Hieman and twin preschoolers at Scott Elementary. I have volunteered with my oldest daughters classes sense K, but only recently (last 2 months) have I taught in her classroom through Junior Achievement. I have done many other classes at all the local elementary schools but am just now starting to do her classroom. I am not as comfortable as I normally would be as I feel that I am either letting her down by not being able to make her my favorite or if I am repremanding another student, they will take that out on her. I don't think that I will be so closely nit with her classroom agian in the future.
How do I want parents involved in my classroom?
I would prefer that parents be more involved in the learning at home rather than in the classroom. I do however want parent involvement for field trips and holiday/birthday parties, but not as much in grading papers or teaching lessons.