Mathella in Oz (or Mexico): The Ins and Outs-Calculating Area and Perimeter (Paperback) (ISBN-13: 9781514800492)

Kathryn Gray is a certified math teacher with over 15 years experience with the Fort Worth Independent School District. She has taught every elementary grade level and served as a math coach. Along with teaching on the elementary level, she also works as an adjunct professor with ITT and Tarrant Community College. Ms. Gray holds a Master Degree in Mathematics and Science and another in Curriculum Development. Wilhelmina Dean is a certified math and special education teacher with over 16 years experience in middle and high school. She currently teach middle school math. She has also worked as an academic adviser at a community college. Mrs. Dean holds a Master degree in Guidance and Counseling along with several certifications in Maryland and Virginia. Together the sisters have a passion to see children learn. They believe that learning must be cross curricular and applicable.