In this lab activity, students will investigate chemical changes that occur when acids and bases react. It is meant to introduce the concepts of chemical changes, mass of gases, conservation of mass, and balancing equations. Students will make qualitative observations and quantitative measurements.

Both suggested learning activities in this lesson will help students understand the relationship between the weight of reactants and the weight of the products involved in chemical reactions. In the first activity students will combine borax and glue, and in the second activity they will combine vinegar and cream.

Through this activity students will understand that there is conservation of mass and energy when matter is transformed.

In this interactive math game, students will learn division facts while brushing the teeth of crocodiles. Students can choose from two different levels, easy and super. Then within each level they can choose from six different fact levels to play. Once they complete the game they can play again.

Students will learn how to use tricks to master multiplication facts. Students will be introduced to only 15 facts they must know to master multiplication facts through 9X11 with the prerequisite that they know the 0's,2's,5's,10's, and 11's.

In this lab students will conduct an investigation to find out if substance either lose or gain mass after a chemical reaction takes place. Students will combine (and measure the mass of) 200 ml of water with a measured mass of antacid. They will add these two masses together BEFORE combining them. Students will then combine the two substances together in a capped bottle and record observations. Students will wait for the reaction to finish, then measure mass of the system. Students will then answer lab questions, and balance the chemical equation for this reaction.

The area model can be used when multiplying any two numbers, including decimals. This video demonstrates how to multiply using the area model when a decimal is involved.

In this Cyberchase activity, students begin by using manipulatives to share objects among different sized groups. After watching a video clip that demonstrates dealing out rounds (or sets) of objects to solve a problem, the students work on a few division problems on their own. A second video clip demonstrates how to solve such problems using numbers. With the handout, students learn to write these problems as multiplication and division facts.

This task is from Tools 4 NC Teachers. Students evaluate two multiplication expressions and compare the products. This is
remixable.

In this unit, 3rd graders practice making sense of one and two step number stories involving all four operations.  Practice may include diagrams, arrays, pictures, words, and number models.  Students will create, share, compare, and interpret representations, students will improve their problem-solving strategies, and students will firmly grasp that problems can be solved in more than one way.

SPECIFIC TO MY 3RD GRADE CLASSROOM:  There will be a strong focus on representing multiplication and division in this unit.