The TI-30X IIS I hope this slide show will help you to feel more comfortable with the calculator and how it might be used in the classroom to enhance learning. The more you use the calculator the more comfortable you become with it and the more effective you will become in teaching your students to use them correctly. If we as teachers can teach our students to use the calculator to be proficient on the OGT, we as an educator, school, and district may become able to help our students reach the half band growth that we would like to see every child gain this year.