Mathematics in Grade III

The mathematics program in third grade and across grade levels in the Lower School encourages children to construct their own mathematical knowledge through meaningful learning experiences. Students solve problems, develop sound reasoning, communicate their mathematical thinking in written and oral forms, make connections to mathematical ideas and real-life experiences, and construct different representations of mathematical concepts. The third-grade mathematics program emphasizes both practical and theoretical aspects. All five content strands of mathematics are taught; number sense and operations, data analysis and probability, measurement, geometry, and algebra. Manipulative materials and games are used to further mathematical understanding, to develop visual discrimination with respect to shape, size, and other attributes, and to further develop pattern recognition and problem-solving skills. Manipulative materials include Cuisenaire rods, place value chips, geoboards, tangrams, tiles, and pattern blocks.
A set of B-VIII Grade standards provides the framework for our work in mathematics. The mathematics program is flexible enough to be able to respond to both differences in learning styles as well as variations in the readiness of our students. Below are listed some of the goals we have for third-grade students in mathematics.  

  • Understands place value concepts in base 3 and base 10
  • Understands and uses the inverse relationship between addition and subtraction
  • Orders read, and writes numbers up to millions
  • Applies addition algorithm
  • Understands multiplication through different models
  • Understands the inverse relationship between multiplication and division
  • Practices and applies standard linear measurement skills
  • Compares and classifies two-dimensional shapes  
  • Understands the difference between probability and possibility, and makes predictions based on probability
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