Given the document below, you have to determine if "Yes" or "No", the summary is factually consistent with the document.

Document:
children who share ipads in class do much better in early literacy tests than those who do n't , researchers claim . the findings come after the general secretary of the national association of head teachers said he was dubious about using technology as a teaching aid in non-it classes . however , research into the effects of the devices on literacy levels suggests the best outcome comes from youngsters sharing devices . children who share ipads in class do much better in early literacy tests than those who do n't , researchers claim ( stock image above ) NAME_1 , at northwestern university in the us , found that , in tests , kindergarten children who shared ipads in classes over an academic year significantly outscored their peers who were in classes that had no ipads or in which each student had their own device . shared ipad

Summary:
1. children who share ipads in class do much better in early literacy tests than those who do n't , researchers claim .
2. the findings come after the general secretary of the national association of head teachers said he was dubious about using technology as a teaching aid in non-it classes .
3. however , research into the effects of the devices on literacy levels suggests the best outcome comes from youngsters sharing devices .

Is the summary factually consistent with the document? (Yes/No)
Start your answer explicitly with "Yes" or "No", and if you answer no, explain which sentence is inconsistent and why.
 I want the entire output in JSON format.
user