I had the unit on Self and we explore how healthy and unhealthy choices affect our life. For that reason, after doing the egg experiment (you should really try it!), I put three teeth and the children added sticky notes about what they thought they needed to do to keep their teeth healthy (like floss, wash, go to dentist, drink milk, eat food rich in calcium); what to we use our teeth for (smile, talk, whisper, sing)...!
Then, we use a worksheet that is also free in this store to consolidate their knowledge.
Hope it works like it did for us!