Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ?

Reinforce your counting, while building critical thinking skills and developing visual discrimination, with these two math activities to accompany the book Ten Black Dots // Mehr

Provocations are so much more inviting when using reflective surfaces and beautiful bowls and trays from Thanks for the heads-up on this great treasure trove!