STEP 1 – The Photo cartoon shows how picture sharing can easily get out of hand. Emphasise to the students that anything they share online can be shared and is no longer private. Then have the students work in groups to come up with a list of all the different ways of sharing pictures. Get each group to read out their list of methods of sharing. Remind students that messages and pictures can be saved by taking screenshots or photos and can then be shared.
STEP 2 – Next, distribute a copy of Worksheet 4.2 Going viral to every student. You can also allow them to take out a blank piece of paper or a calculator. Students should then follow and complete your instructions carefully.
Read the following script:
Imagine you see a picture that you think all of your friends would really like. You decide to share the picture online or using a messaging app. After 10 minutes all of the people you shared the picture with have seen it. Write down the number of people with whom you shared the picture. Another 10 minutes pass and your friends have now shared the picture with all of their friends. To get an estimate of how many people have seen the picture after twenty minutes, multiply the first number you wrote down by itself (eg 20 x 20=400) and write down your answer.
These people in turn share the picture with their friends. To get an estimate of how many people have seen the picture after thirty minutes, multiply your last answer by the first number you wrote down (400 x 20=8000). These people in turn share the picture with their friends. To get an estimate of how many people have seen the picture after forty minutes, multiply your last answer by the first number you wrote down (8000 x 20=160000). Again these people share the picture with their friends within ten minutes. To get an estimate of how many people have seen the picture after fifty minutes, multiply your last answer by the first number you wrote down (160000 x 20=3200000).
Another ten minutes passes and these people now all share the picture with their friends. To get an estimate of how many people have seen the picture after an hour, multiply your last answer by the first number you wrote down (3200000 x 20=64000000). Next time you login online, the picture you first shared is everywhere. This is called a viral effect, because the picture has spread like a virus.
STEP 3 – Get the students feedback to this activity:
– Q. What did this exercise teach you about photo sharing using the internet?
– Q. What would the effects be on a person if a mean or hurtful post was shared in this way?
– Q. How easy do you think it is to remove photos from the internet?
Note: This activity can be extended to help explain the mathematical concept of indices to 6th class students.