Math Focus 1
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# Surf for More Math

## Chapter 3: Introducing Addition and Subtraction

### Lesson 9: People on the Bus

Use these interactive activities to encourage students to have fun on the Web while learning about addition and subtraction. Students can try these activities on their own or in pairs.

Goal

Act out joining and separating situations.

[CN, PS, V]

Instructions for Use

Build a Train allows students to add and subtract numbers 1 to 4.

To start Build a Train, watch as the screen shows how the game is played.

To play Build a Train, click on the die to roll it.

If the die shows a + sign, you will build cars onto the train.  If the die shows a – sign, you will take trains cars away.

Following the direction on the die, click on the cars on the track below to add them to the train, or click on the cars on the train to subtract them from the train.

Click “OK” to complete your move.

Continue until your train is complete.

Count Us In--Game 7 allows students to solve joining situations.

To play Count Us In, look at the number of kids you need to put on the bus.

Click and drag the correct number of kids onto the bus, placing the kids in any combination in the top and bottom rows of the bus.

Once the kids are sitting down on the bus, click the "Check Number" button to make the bus go.

If there are too few kids, continue to click and drag until you have the correct number. If there are too many kids, click on any kid to move them back to the sidewalk.