DESC: Teacher kit of (10) TI7 Math Mate Calculators * Teacher Kit includes 10 TI7 Mathmate Calculators, plastic storage case, classroom poster, transparency, and teacher's guide in English and Spanish * Hard plastic, tamper-proof keys. * Large, color-coded keys. * Low-light solar power; never need batteries. * Large 8-digit display. * Impact-resistant slide case. * Addition, subtraction, multiplication, division. * Performs operations in familiar M-D-A-S order. * Automatic constant for all four operations. * Parentheses keys. * Change sign (+/-) key. * 3-key memory. * Capability to clear last entry and/or all entries. * Overhead projectable model available: Stokes model TI202. * D&H carries workbooks for the TI7MathMate: MathMate Activity Books Level 1(STK107), Level 2(STK108), Level 3(STK109).