If you do not get enough rest for a long period of time, or if you are tense or nervous about things for a long period of time, your body becomes weaker, your immune system does not work as well and you have more chances of getting sick. Ask the students if they can think of sources of stress in their lives. There are also ways to handle stress. Ask if the students can name some. Learning how to deal with stress effectively is one way to maintain good health.
Notes Write the word stress on the chalkboard.
If needed, review the role of the immune system. For details, refer to the grade one sample unit on preventing diseases. Observe the students' awareness of sources of stress in their lives. Ask the students to identify what poor choices Lin made. Invite the students to brainstorm possible consequences of her poor choices.