Membership Services

Key features of membership are:
  • A large library of activities.

  • A network for exchanging new ideas, or extending current ideas.

  • A professional development context for the continuing enhancement of children's number sense beyond what is normally expected for their age.

  • In particular, a developing understanding of, and commitment to, the teaching craft of Threading as a way of providing time for children to construct their own learning.

  • Working Mathematically with Infants... threaded activities and investigations combined in 10 weeks of planned number work for each semester from K - 2. Kit contains 25 Poly Plug and a manual, including Planners, written with the attitude that all children can learn to work like a mathematician in best practice classrooms.

  • Purchase of any number of Poly Plug at the cheapest available price.

  • Discount membership of Picture Puzzles
    $110 instead of $165 - a 33% saving!
  ... Membership Fee



  • Permanent membership for one campus regardless of student numbers.

  • Photograph or scan and email our Order Form or a school purchase order.

  • Include at least one staff email address, preferably two, on the order for delivery of password and updates through our occasional eNews.

This site grows because teachers contribute. Every activity has been well tested in classrooms. Check our Activities List (PDF file) for details. Members are encouraged to share their experiences and add to this pool of practical knowledge.

In addition, Members have exclusive access to additional information from the Calculator Aware Number (C.A.N.) project (see Calculating Changes Background) which is the longest running documented project linking the use of calculators and manipulatives.

Calculating Changes ... is a division of ... Mathematics Centre