In this lesson, students write and evaluate algebraic expressions at specific values. They will also use variables to represent numbers and write expressions when solving a real-world or mathematical problem.

In this interactive math game, students will fluently solve multiplication problems while popping the balloons in order from smallest answer to largest answer.

In this German-language website, students can see what Burger King products are sold in Germany and learn their names in German. Products are pictured and described in detail.

In this lesson, students will estimate capacity and the relationship between several unusally shaped containers. They will verify relationships, express the relationship using variables, and apply the expressions to determine equivalent portions for each standard unit.

In this activity, students investigate and discover how factors such as surface area, concentration, and temperature affect the rate of a chemical reaction involving hydrochloric acid and antacid tablets. After watching a demonstration of the reaction, students will generate hypotheses for how to change the speed of the reaction, develop procedures for testing their hypotheses, carry out the experiments, and collect data in their lab notebooks/science journals.

This tool, created by Science NetLinks, challenges students to consider mathematical equations to get from one number to another in a math maze. Students use a series of addition, subtraction, and multiplication equations to reach their goal.

These Tasks are from Tools4NCTeachers. These Tasks align to 4.NBT.5. These are remixable.

This lesson is from Tools4NCTeachers. In this lesson, students will model the distributive property using multiple representations and explain why it works. This is remixable.

In this lesson, students encounter a situation in which they must solve for the value of a variable. The equations are in the form of p = qx, in which q, x, and p are all whole number values. This CYBERCHASE activity is motivated by an episode in which the CyberSquad plays a game against Hacker to catch enough "gleamers" to power up the Cyberspace ship. If they win, they get the Encryptor Chip. But first, they must figure out the relationship between gleamers and power glows.