Mental Math Champs — The 20-to-80 Number Sense System (Grades 3–6)

Description

The complete mental-math training system for elementary kids: 50+ tips and tricks with step-by-step worked examples, 25 timed practice tests that ramp from 20 to 80 questions (always in 10 minutes), a true day-by-day 16-week calendar, 40 contest-style word problems in two 25-minute challenge sets with solutions, 48 cut-out flashcards, and the Score Mountain progress tracker with cut-out level badges. 108 pages across 11 printable PDFs, instant download. Every answer key machine-verified. One household or classroom license. Independent resource; not affiliated with any competition organization.