ELE II Mathematics III
Philosophy and rationale of the curriculum area of mathematics to include the study of the concept of number and quantitative relationships, base ten systems, four fundamental operations, laws of arithmetic. Measurement (time, space, weight, money), ratio and proportion (fractions, percentage, decimals), problem-solving, exponential notation. Preparation for algebra (concept of unknown, equations in the concrete) and probability and statistics (data collection and methods of data display).
Montessori Today by Paula Polk Lillard
Mathematics Manual Vol. 3
Fraction Manual Vol. 2