This website is approved and promoted by elementary school teachers all over the world.
I built this website in 2007 for my children when they were in elementary school.
My son's math and science teacher loved the site. She's since retired and my kids are now in univesity.
In the last 11 years, we've received thanks and comments from so many teachers who love and promote this site.
But most importantly, my wife... an elementary school teacher... approves of this site.
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