How much sports drink can fit in a plastic bottle? How many books can fit in a backpack? Do large objects weigh more than small objects? Explore some real-life situations where being able to make exac
"Vacations can be an exciting way to spend time with family. Come along on a multiplication journey as two families find out that getting there can be part of the vacation fun! All the while, explore
"NASA wants to send humans to Mars within the next 25 years. But before that can happen, they must estimate and prepare. They need to problem solve to keep the crew alive on such a dangerous planet. L
"Moving can be a big deal for anyone. But, immigrants to the United States really went the distance. Why did they decide to come? How did they travel? What happened when they arrived? Data is in the d
