We suggest students work in pairs. Each student will work on a separate portion of the World Map, but students in pairs can help check each other’s work. Homeschool students can work on their own, completing a few pieces of the map if they’d like. But we provide a key so solo students don’t need to complete all 18 maps.

You will need enough space on a wall or door to accommodate a graph that’s 76 stickers high and 3 bars wide. See below for details.

Plan Your Time

If you have limited time, you can divide this lesson into two sessions.

Part 1 (counting and recording squares on a map) takes 10 to 15 minutes.

Part 2 (making the graph) takes another 15-20 minutes. Part 2 begins at Step 6.

Prepare the Bar Graph

Find a good spot for your graph. Cut out the “Bar Graph Labels” and place them on the wall or door. See the photo for the way we did our graph. If you use 1/2” strips for your stickers, as we did, your graph will be 56” high and 30” wide.

Organize the World Maps

Post the “Where In The World Is My Map?” printout so students can see the map sections they’ll be working with during the activity.

Each student will need at least 1 of the 18 different maps we’ve provided. If you have a large class, it’s fine for more than one student to have the same map. If you have a small class, distribute at least one map to each student and use the “Map Checklist & Answer Key” to find the rest of the information you’ll need. We’d also suggest printing out an extra of each map used, if possible, in case a student has trouble counting and needs an extra copy.

Teacher Tip

Be aware that counting lots of little squares can be tricky, and counts may vary, even among students working on the same maps. We suggest you remind students that their work should be as accurate as possible, but a few squares off here or there won’t change the graph. Any answer that’s close to the count on the “Map Checklist & Answer Key” will work out fine.

We suggest students work in groups of four. If there are just a few students, they can form a smaller group. A solo student can do the activity alone, but we think it’s more fun with friends.

Set up Aquifer Stations (Optional)

Since there’s so little prep for the main activity in this lesson, we suggest you consider making Aquifer Stations, as described in the Extensions section. These will give students a chance to experiment and observe how water is stored underground.

You will need access to a refrigerator and microwave for this activity.

We suggest students work in groups of four, which works well because there are four experimental set-ups. Homeschool students can work on their own, but will need all four experimental set-ups so that they can make comparisons.

You will need several small plastic bottles for this activity (4 bottles for every group of four students, plus a few extras to have on-hand). We encourage you to use recycled bottles when possible.

Prepare the Water Bottles

You’ll need to start preparing for class the night before by refrigerating the cold bottles overnight. You can prepare the hot bottles in a microwave an hour before class.

First, if you are using recycled bottles, fill all the bottles with tap water. Then divide your bottles evenly. Half of these will be your cold water bottles and half will be your hot water bottles.

To prepare the cold water bottles:

• Open each bottle, drip in a few drops of blue food coloring, and close them back up.
• Place them in the refrigerator for at least a few hours to cool them down.
• If you’re in a rush, you can chill them faster in the freezer. You don’t want them to freeze, just be really cold.

To prepare the hot water bottles:

• Open each bottle and drip in a few drops of red food coloring.
• Leave the bottles open. (This is important! If you don’t, they may burst.)
• In our microwave, we heat 6 to 8 bottles at a time. We heat on high for one minute, check the temperature, then repeat until the water is hot. You will have to determine the best power setting, time, and number of bottles for your microwave. We suggest erring on the side of less power and time, to avoid overheating the bottles.
• When the water is hot, carefully remove the bottles (you may want to wear oven mitts!) and screw the tops back on.

Store hot and cold bottles in separate coolers until class. In our experience, they’ll stay warm or cool for at least an hour in a cooler.

Separate Materials for Easy Distribution

You may want to separate supplies for easier classroom distribution. Each group of four students needs the following:

We suggest students work in groups of four. Homeschool students can do the activity on their own, but we think it’s more fun with a few friends.

Plan Ahead

This simulation is very engaging and may take more than 20 minutes for students to complete. Consider dividing this lesson into two class periods. We’ve provided challenge questions in the Extensions for those who want to extend the activity.

Prep Glue Dots

Each student will need 6-7 glue dots. You may want to prep this prior to class to make distribution easier.

Separate Worksheets For Easier Distribution

At the start of the activity, students will need the Beachtown Engineers printout, scissors, and colored pencils. They will later need the Beachtown Budget, Final Plan, and some sticky glue dots. You may want to separate these supplies into two piles for easier classroom distribution.

Display Student Work

You may want students to post their work so that each group can see the similarities and differences in the engineering solutions. If you decide to do this, you’ll need wall space and supplies (tape or push pins) to display The Final Plan of each group.