In this video, students learn how to read and write decimals using base 10 blocks. The video explains that decimals represent parts of a whole, and demonstrates how to read and interpret decimal numbers. It also introduces the concept of...

The $0.5 billion James Webb Space Telescope became a $10 billion device when NASA spent billions to fix the design of its giant sunshield’s deployment mechanism.

Join our character Gerry in his hometown by the sea as he investigates the values of common US coins. Gerry buys ice cream, dill pickles, and even describes a little bit about the history of the presidents whose faces adorn US coins!

In this video, the teacher explains how to represent common fractions as percents by renaming them as equivalent fractions with 100 in the denominator. The teacher uses mental math and a money analogy to help students understand the...

How to know the intonation of questions? Yes/no questions go up in pitch at the end, while other questions go down in pitch.

In this video, students learn how to represent equal decimals by adding zeros. The teacher uses examples with money to explain the concept, showing how decimals can be broken down into different parts.

In this video, we explore the relationship between fractions and decimals by using multiplication. We learn that many fractions can be easily converted to decimals without long division or a calculator if we know the decimal equivalent...

In this video, students learn how to find a fractional unit rate by using a graph. The teacher explains that unit rates can be expressed as fractions instead of decimals, and provides examples of how to calculate unit rates from graphs....

In this video, students learn how to use benchmark fractions to estimate the sums and differences of fractions in story problems. The teacher explains the concept of benchmark fractions using the dollar and number line representations.

In this video, the teacher explains the concept of unit rates by using examples and pictures. They demonstrate how unit rates compare a measured quantity to one of another measured quantity, and emphasize that unit rates always compare...