Number Slider is a logic and number sequencing game where students slide numbered tiles across a grid to place them in correct order from least to greatest. Since tiles can only move into the open space, players must plan carefully and think several moves ahead. The game supports K–5 math skills including number sense, counting patterns, numerical order, spatial reasoning, and problem-solving. As boards grow from 3×3 grids to larger puzzles, students build persistence, strategy, and flexible thinking.