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  • Khan Academy
  • Prodigy¬†
  • You Cubed Math:
  • Open Middle: Challenging Math Problems Worth Solving by grade level:
  • Math Pickle: Fun and engaging math puzzles:
  • Intriguing math problems and strategies for teaching math: All grade levels.
  • You do not need a screen to work on the basics of addition, subtraction, multiplication and division with your kids over the summer. Have them skip count by 2s, 3s, 5s, 10s, 9s, forward and backwards. Introduce skip counting by 4s, 6s, and 7s.