Montessori Unlimited uses pixels, or transparent GIF files, to help manage online advertising. These GIF files are provided by our ad management partner, DoubleClick. These files enable DoubleClick to recognize a unique cookie in your web browser, which in turn enables us to learn which advertisements bring users to our website. The cookie was placed by us, or by another advertiser who works with DoubleClick. With both cookies and Spotlight technology, the information that we collect and share is anonymous and not personally identifiable. It does not contain your name, address, telephone number, or email address.