Mathematics

 

Mathematics is one of the more developed areas in Montessori.  She had taken a range of ideas from both algebra and arithmetic, and then worked back into the youngest levels to develop materials and provide experiences that would facilitate the development of the mathematical mind of the child.  As this emerged, she discovered that all children have an innate capacity to enjoy and do math.  The preparation for math in the sensorial materials helps to shape the imagination so that when it starts entering into the operations of math, the child already has a vivid and refined imagination on which to build and explore. She also helped to develop a sequence of materials and games that facilitates the way that math has developed its own language, especially using the decimal system.  In general, as with all of her pedagogy, one moves from concrete experiences to the use of signs and symbols in an increasingly abstract manner.

 

In learning Montessori it is best to think of two major phases, the first is minor, the second is major authenticity. Authenticity means being true to something. Minor authenticity means being true in this case to what was developed by Montessori herself.  When you really learn what she learned, and learned how to do something as she learned how to do something, that is minor authenticity.  Major authenticity is when you either correct or improve what someone said or did, in this case Montessori, or you add more to it.  Minor authenticity ALWAYS comes first.  Do not try to “improve” or “advance” Montessori unless you first learn her way and works by heart.  This usually takes years for most people.  It does not mean that you will sometimes see improvements or advances along the way.  Write these down in a journal because they may be real.  But be weary about whether these really are improvements or advancements until you have become authentic to her achievements and gifts.  Too often people pick up one idea from another, and it is only partially understood, and then run with it thinking they not only found the key but can advance it.  This really is built on false pride and it is a significant type of minor inauthenticity.

Mathematical Presentations

  1. Number Rods
  2. Sandpaper Numbers
  3. Number Rods and Cards
  4. Spindles
  5. Counters and Cards
  6. Games with Zero and Loose Quantities
  7. Introduction to the Decimal System
  8. Large Number Cards: introduce units, tends, hundreds, thousands via three part lesson
  9. Large Number Cards and Golden beads
  10. Bird’s Eye View of the Decimal System
  11. Composition (addition) and Decomposition (subtraction) with Number rods
  12. Decimal Systems Operations
  13. Bead bars and when to use them
  14. Short bead stair- addition
  15. Short Bead Stair – subtraction
  16. Introduction to 10-19, “10-19” Boards
  17. Introduction to Tens via ten boards
  18. Linear Counting
  19. Snake Game Addition
  20. Snake Game Subtraction
  21. Addition Tables
  22. Commutative law of addition
  23. Multiplication Beads
  24. Commutative Law of Multiplication
  25. Skip counting
  26. Stamp Game: Addition, Subtraction, Multiplication, Division
  27. Dot Game
  28. Addition Stripboard
  29. Addition charts
  30. Subtraction Stripboard
  31. Subtraction Charts
  32. Three Aspects of Subtraction
  33. Multiplication Tables
  34. Multipliplying by 10 and 100
  35. Multiplication Board
  36. Multiplication Charts
  37. Factors (or “divisors”)
  38. Stamp Game: Long Division
  39. Group aspects of division
  40. Unit Division Board
  41. Exercise with the 81 beads
  42. Division Chart
  43. Division Boards
  44. Small Bead Frame
  45. The Divided Mat
  46. Multiplication with the Small Bead Frame
  47. Flat Bead Frame: Long Multiplication
  48. Factors and Prime Numbers
  49. Linear and Liquid Measurement
  50. Large Bead Frame
  51. Bank Game: Long Multiplication
  52. Fractions (many sub-parts)
  53. Geometry (many sub-parts)
  54. Money
  55. [BETA] Find the commutative law of addition