Part 2: Prepare your Weather Learning Log
Tell the students that they are now going to use the Internet and the weather instruments they made to record weather measurements every day for a two-period (or however long you decide) in their log, student worksheet, or in one of the electronic formats using the downloadable Excel (activity3.xls) or Word (activity3.doc) documents . Regardless of which format you decide, discuss how to make the entries in the weather log. For example, each student should make an individualized report, students in each group can take turns making entries, but all should participate in the data collection.

• If you are not using the Weather Learning Logs, you will simply need to distribute the Student Worksheet or Word document for each student or group of students.
• The downloadable Excel document can be used in one of two ways: each student or group of students can individually save and update their own document or a master-class document can be used and updated by different students / groups during the two-weep period.
• The Excel document is formatted a little different than the Student Worksheet. Instead of three separate tables, each weather variable (temperature, air pressure, etc.) has been sub-divided by each of the three cities. This was done to make it easier to graph and compare the different cities after all the measurements over the two-week period have been recorded.

Part 3: Track Weather like a Meteorologist
Each day over a two-week-period (minimum), students should take the weather measurements using their class instruments and the weather web sites linked to the activity. If you are using a wall chart, you should assign alternating groups of students to update it. On the first day, you should demonstrate what the students will do during the two-week period and lead them through the first entry; then they should be able to do the data collection themselves. If you opt for different groups to take the daily weather measurements and share with the class, it is helpful to design and post a task-calendar and assign the days to the different groups.

1. Weather at your school - Review the following important notes before beginning this activity:
   • Collect the weather data using the weather instruments at the same time each day, preferably at some time between 1:00 - 3:00 pm. This is because it is generally the hottest part of the day and can then be compared accurately with the high temperatures from the other two cities (see below).
   • Measure the temperature using the commercial thermometer in the shade. You will also need to leave the rain gauge outside in a secured area to collect the daily precipitation totals.
   • Measure air pressure using the weather web site. If you decide to continue to use the class barometer, record the measurements in a separate place.
   • If your school building or class is in an urban setting and the anemometer and wind vane will be obstructed by buildings, use the weather web site to insure accuracy.
2. Weather from New York, NY, USA and Sao Paulo, Brazil
   • If you leave the weather web pages open for a long period of time, click the refresh button on your browser to insure that you have the most updated weather information.
   • Daily precipitation data is not available using the primary web site for either New York or Sao Paulo and therefore will not be measured. However, students should use the class rain gauge to measure for their city. As an optional activity, precipitation data is available using the back-up site for New York city and can be recorded.
   • IMPORTANT: Students should record only the high temperatures from each day's forecast. Since these are real time weather readings, the time of day in the regions may be quite different and therefore it would be inaccurate to compare the current temperature of different cities at different times.
3. Repeat for Two Weeks: Students should continue to record the weather measurements every day for the two-week period. If you are unable to record the data for one day or over the weekend, you can always use the "Historical" data for the previous days.