Description: A step-by-step, ability-based program workbook that helps children understand the basic concepts and principles of math, strengthens problem-solving skills, and nurtures thinking and creativity. C1 - Splitting numbers using concrete objects - Splitting numbers using semi-concrete objects - Splitting numbers using written numerals - Combining numbers using concrete objects - Combining numbers using semi-concrete objects - Combining numbers using written numerals C2 - Splitting and combining numbers - Splitting numbers in various ways - Combining numbers, then splitting them again - Splitting numbers, then combining them again - Practicing addition - Practicing vertical addition - Practicing subtraction - Practicing vertical subtraction - Practicing addition and subtraction together - Solving problems by switching operations C3 - Measuring length / Measuring height - Measuring area / Measuring size - Measuring perimeter / Measuring weight - Measuring volume / Measuring capacity - Understanding activity time / Understanding the order of time - Practicing various types of measurement C4 - Making groups of ten - Bundling into groups of ten - Understanding place value - Understanding the number "10" - Understanding the size of 10 - Finding numbers that add up to 10 - Counting up to fifteen - Counting up to twenty