# Surf for More Math

## CHAPTER 2: NUMBER TO 50

**Lesson 4: Estimating Quantity**

Use these interactive activities to encourage students to have fun on the Web while learning about the numbers to 50. Students can try these activities on their own or in pairs.

**Goal**

Use a referent to estimate.

[C, ME, R, V]

**Instructions for Use**

**Estimate How Many** helps student develop estimation skills.

To use Estimate How Many, click on “Unit 4: Numbers Through 100” and select “Lesson 11.3”. Read the Quiz Rules and click “Begin”. A box around a group of ten items is used as a referent . Use this referent to estimate how many items are shown. Select the best answer from the three choices. Click “Check Your Answer” to check. If your answer is correct, the next group of items is shown. Click “End the Quiz” when you have completed the quiz and to view your final score. Click “Exit” to end the activity.