Homework:
There are two options for the homework of this lesson, emphasizing on different aspects of learning. The data collection and analysis homework guides a student to properly collect data, make observations and use analytic thinking to arrive at reasonable conclusions. The paint and report homework guides the student to perform survey or literature review on certain topic and express their ideas with graphical representation, and use analytic thinking to answer short questions.  
Option 1: Data collection and analysis homework.
A student can use the data sheet provided to record down specific weather related data. Based on the data accumulated for a period of time, the student can come up with arguments or verify a hypothesis that he/she obtained from external sources. Examples are as below:
1.     A cloud tracker. The student can choose a regular timeslot at the beginning of a day to observe the sky and tell the cloud data. Then the student can observe the weather during that day and record it down. This can be done for seven consecutive days. Or the student can choose those days when typical type of cloud appears in the sky. The expected result is that certain type of cloud precedes certain kinds of weather. But there is a chance that the result does not reflect any pattern at all. Then the student should be reminded that first of all, weather forecast is based on complicated scientific data collection and analysis which cannot be perfectly precise, and secondly the reliable weather patterns are found by the weather scientists through years of data from all over the world, which requires patience and hard work.
2.     A weather tracker. The student is required to watch and record down weather forecasted through TV or mobile app etc. for consecutive days. Then the student should record down the actual weather data for the same day, including temperature and rain etc. After the data are obtained, the student can compare the forecasted weather and the actual weather data to tell the difference between the two. The student will learn concepts like “error rate” and “precision” by the comparison and calculation. Furthermore, if the tracking of weather is during a specific season such as summer, the student can try to summarize certain characteristics of the weather in that season. Note that the summarized result can vary significantly depending on the location of the student.      
 Option 2: Paint and report homework. 
Provide a list of typical weather phenomena for the students to choose from. Each student will read related books or research online (with the help of parents if necessary), draw a picture of the weather phenomena reflecting what they have seen/known or with their imagination, and write a short report covering the following points:
Students can learn to create graphical presentation of concepts by drawing the picture, and they can polish their analytic thinking skills through research and literature review of a given topic.
For the two options above, the teacher can let each student choose which one he/she prefers to work on, or a lucky draw can be organized so that half of the students take the first option and the remaining half take the second one.
Followups:
After grading the homework submitted by the students, it is suggested that the work from all students to be publicly shared to the whole class in the following class sessions, so that students can exchange their ideas and findings and learn from each other.
 
References:

[1] https://en.wikipedia.org/wiki/Weather