It is important that students write in mathematics to show their understanding of the process standards as they are included with the TEKS. The categories for the four writing centers for K-2 are: Fun with Numbers, Literature,Problem Solving, and Numeral Writing. For the students in grades 3-5 the four centers are: Math Concepts,Number of he Day,Problem Solving, Rules for Writing Numerals. Example exercises for each category are below.