Curated OER
What's Missing?
Add a challenge for your young mathematicians' adventures in double-digit addition. Instead of simply computing sums in the 9 problems, they work backwards to fill in blanks among the addends. Resource makes a terrific extension or...
Curated OER
Even and Odd
Does your class know the difference between odd and even numbers? Put their knowledge to the test! Learners count groups of objects and then decide if the sum is odd or even