The IAS is available here.

The pdf you found online is an old 2nd edition Form. Some may say the pdf ought not to exist as the materials are protected by copyright. The 3rd edition has been in use for several years. There are three components: the Form, the Manual, and the Planning Record.

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I'm feeling pretty good about deciding to go for it.
1) How does your child feel about early entrance to kindergarten?
2) For additional confidence, see quote regarding research results in this post