Wireshark

https://www.wireshark.org/

Step 1. Choose a network interface.

Step 2. Wireshark will begin recording.

Wait for your victim to generate network activity.

Step 3. Stop recording

Step 4. Filter results by "HTTP"

Step 5. Follow the HTTP stream.

Step 6. Inspect HTML.

It seems that our victim was trying to access http://woottonaoit.org over an unencrypted connection. Maybe we should talk to our school administrators about Let's Encrypt.