Originally Posted by TuffToodle
How does grade skipping work exactly? I am sure that she is able to do all of the work presented in first grade (as well as some second), but she would have to "catch up" first. How do they place her where she belongs and address the material she missed?
To answer this in a sentence, a school would generally seek to determine whether the child had learned enough on his/her own (outside of school) so that there are not noticeable or sizable gaps. Some schools may ask students to take the end-of-year assessments.

You asked how a full grade acceleration (grade skip) works? In addition to reading information at the link provided for Iowa Acceleration Scale (IAS), you may want to check:
1) your school's policies... often found online. Does your school website mention anything a about this? Or about single-subject acceleration (SSA)?
2) Also check your state laws and state department of education for information online.