# Sand Dollar Exchange Lesson Plan

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Mathematics

4

### Objectives:

Students will be able to correctly indentify picture fractions that include reducing opportunities, fractional equivalent, and ordering of fractions using visual models.

### Common Core Standards:

4.NF.1 – Explain why one fraction is equivalent to another fraction by using visual fraction models, with attention to how the number and size of the parts differ even though the two fractions themselves are the same size.
4.NF.2  – Compare two fractions with different numerators and different denominators, by using a visual model.

### Warm-Up Activity:

As a warm-up activity, watch the “Ordering Fractions” video as a whole group located at the following link.
http://mrnussbaum.com/fractions_videos/. This is a great way to engage your students and to review or to introduce the skills of ordering fractions, prior to playing the Sand Dollar Exchange game.

### Warm-Up Activity #2:

As a second warm-up activity, go to the fractions drill page at the following link to review equivalent fractions because the Sand Dollar Exchange game will include some equivalent fractions.  You can do this in the computer lab individually or you can use an interactive white board or projector to display the screen for a whole class activity.
Use this link to access the drill page http://mrnussbaum.com/fractions_drills/. Then, click on one of the equivalent fractions links.

### Main Activity:

Once you have reviewed a few fraction concepts with your students you are now ready to play the Sand Dollar Exchange game. It might be helpful to view the instructional video first (http://mrnussbaum.com/sand-dollar-exchange-2). This game can be played on individual student computers or a whole group activity using an interactive white board. Tell students, time is of the essence. The quality of certificate they earn is determined by how quickly they can complete the game.

### Assessment:

Informal Assessment:

One suggestion for an informal assessment is to allow students to complete one of the fraction drill activities from the website and then have them print the results page.

Formal Assessment:

Have students complete the attached (and fun) Sand Dollar fraction page (http://mrnussbaum.com/sand-dollar-exchange-printable/)