We like the shield concept but think that this specific design has been done before with another school. Maybe try different shield concept. Also consider placing the design to the left of the text.
for design number 11 can you take the dove out and put on a white background? for design number 14 what about taking out the tree and putting a cross or something else in book in the end i think we like the logo on top text on the bottom what about trying to add in another color to add some depth . . also what about a knight concept logo?
we are leaning towards more of a shield concept but like the MCA logo you put together on #13. any way to incorporate this into a shield? the dove and cross look to much like another logo. maybe MCA and cross in a shield?