The mark consists of There is a circle within another circle. The inner circle takes up 5/7 of the outer circle. There is a black line demarcating the two circles. The outer circle has a black border line, and a thinner border line inside and set off from the outer black line. In front of the circles is a banner which goes horizontally straight across the center of the circles. The banner says "Castle Hills" in capital letters. In the white space above the inner circle, the words "The Christian School At" is written in capital letters in an arch following the white space from banner point to banner point. In the white space under the inner circle, spanning from banner point to banner point are the words "to know Christ and make Him known" written in capital letters which arch with the white space. In the inner circle space above the banner is a white line drawing of the top half of an eagle with its wings outstretched and its head facing to the right of the observer. The left wing and head are one line, and the right wing is a second line. Centered in the inner circle space under the banner is the word "EST." in white capitals followed by the year "1981". On either side of this is a white laurel branch which gently arches along with the curve of the outer white circle.