Problems of the Week: (subscription required)

• Current PoWs
• PoW Library (past problems)
• Write Math with the Math Forum (K-12 problems aligned with state standards and popular curricula)

Characteristics of PoWs:

• non-routine
• involve rich mathematical concepts
• allow for multiple solution paths
• challenging
• lead to deeper understanding

Math Tools

Also:

• Teacher2Teacher
• Internet Newsletter
• Public Discussion Groups
• Teacher Exchange
  • Suzanne's Mathematics Lessons
  • Varnelle Moore's Primary Math
• Online Mentoring Project for teacher educators