Curriculum Extension Units (CEU'S) Curriculum Extension Units offer opportunities for selected students in grades two through five to participate in thematic units that engage them in advanced-level thinking, questioning, and research. Students are nominated for participation by teachers based on academic strengths as demonstrated on a variety of performance indicators such as assessments, test scores, and parent input. Selected students receive individual letters of invitation. While participating in these units, students receive instruction from the G/T Resource Teacher in advanced-level communication, research, and technology skills. Students develop an individual or group product for presentation and evaluation by an appropriate audience. Enrichment unit products will be shared with the community at the school enrichment fair in May.