Number Sense Blog

Mental Math: The Distributive Property Meets Wholes and Parts Whether you’re working on arithmetic or algebra, a strong understanding of the distributive property is a valuable tool to have in your mental math toolkit. Here’s our favorite way t...

Grades 1 – 6: Penelope baked a total of 144 cookies. She kept 40 for herself. She then took the remaining cookies and wrapped them in goody bags. If 4 cookies go in each goody bag, how many goody bags can Penelope make? Grades 6 and up: The pro...

Now that it's October, we have blustery weather, fall leaves, and Halloween on our minds. We're celebrating all month with a fun activity -- Trick or Treat! Solve these five math problems using mental math “tricks”, tell us how you solved them, an...

Summer has flown by and Back to School season is here! This is a great time for new beginnings on the academic front, so let’s get organized and set priorities. Have a peek at our Back to School checklist to get started.   Buy school supp...

Upper Elementary/Middle School During a trip from City A to City B, a driver averages 25 mph. On his return trip, he drives faster, averaging 50 mph. What percent of the first travel time does the return trip take at the faster speed?  Answe...