Each of the four kits in this teacher's guide to a Spanish science/math strand for first graders provides for the development of mathematical competencies needed to function in science. Instructional and assessment activities in the bilingual curriculum are pupil centered, and contents are designed to enable the child to develop skills in the processes of observing, communicating, using numbers and spatial relationships, classifying, and measuring. Activities support a basic theme of the child in relation to the classroom. The guide details the focus, objective, and materials for each learning activity in English and Spanish; teacher instructions are in Spanish. The kits, each designed for a period of two to three weeks, contain the following instructional activities: identifying, naming, and producing primary and secondary colors and color combinations; comprehending, manipulating, and comparing sets, equivalent and nonequivalent; naming, classifying, and identifying basic geometric shapes, numbers, and colors; identifying and using numerals 0 to 9, and the plus, minus, and equal signs; building a foundation for accurate measurement; identifying and using ordinal numbers (first to eighth); adding and subtracting numerals 0 to 6 in horizontal and vertical algorithms. (RS)