Grades K–2 · Teeth basics
Tooth Explorers
Meet the tooth team — front cutters, pointy tearers, and back grinders — count all twenty baby teeth, and find out why every one of them matters.
What you'll learn
- Students will name the three kinds of teeth — front cutters, pointy tearers, and back grinders — and match each to its eating job.
- Students will state that kids have twenty baby teeth.
- Students will explain that baby teeth save the spots where grown-up teeth will come in.
- Students will describe what a wiggly tooth means — a grown-up tooth is on its way.
Open wide and look in a mirror — you have a whole tooth team in there, and every player has a job!
Meet the tooth team
- Front cutters. Grown-ups call them incisors. They bite off pieces of food, like the first crunch of an apple.
- Pointy tearers. These are your canines — the pointy ones next to the cutters. They grip and tear food that’s tough.
- Back grinders. Your molars live in the back. They’re wide and bumpy, perfect for mashing food up small so it’s easy to swallow.
Kids have twenty baby teeth — ten on top and ten on the bottom. Try counting yours in a mirror!
Wiggly teeth are good news
Baby teeth don’t stay forever — and that’s the plan. Under your gums, grown-up teeth are getting ready. When one is ready to come in, your baby tooth gets wiggly and falls out to make room.
But here’s the secret: baby teeth have one more big job. Each one saves the spot where a grown-up tooth will live — like a friend holding your place in line. That’s why we brush and protect baby teeth even though they fall out someday: a healthy spot-saver means a healthy smile later.
Ready to show what you know? Try the quiz below, explorer!
Print & go
Printables for this lesson
The educator plan includes objectives, standards, the step-by-step lesson, and a paper pre/post knowledge check with answer key. The family sheet is bilingual — English and Español on one page.
Standards alignment
Sources
Every health claim in this lesson comes from a primary source and is clinically reviewed before publication.
- Source: ADA MouthHealthy — Baby Teethaccessed 2026-07-28
- Source: ADA MouthHealthy — Eruption Chartsaccessed 2026-07-28
- Source: KidsHealth (Nemours) — Your Teethaccessed 2026-07-28
Licensed CC BY-NC-SA 4.0 — free for schools and families to use, share, and adapt with credit (non-commercial, share-alike).
Healthy Smiles. Brighter Futures. · atomicsmile.org/learn
Tooth Explorers — Educator Lesson Plan
Learning objectives
- Students will name the three kinds of teeth — front cutters, pointy tearers, and back grinders — and match each to its eating job.
- Students will state that kids have twenty baby teeth.
- Students will explain that baby teeth save the spots where grown-up teeth will come in.
- Students will describe what a wiggly tooth means — a grown-up tooth is on its way.
Standards alignment (NHES)
- NHES 1.2.1 — Identify that healthy behaviors impact personal health. (Standard 1, Pre-K–Grade 2, NHES 2nd ed., 2007)
- NHES 7.2.1 — Demonstrate healthy practices and behaviors to maintain or improve personal health. (Standard 7, Pre-K–Grade 2, NHES 2nd ed., 2007)
Materials
- A hand mirror for each student or pair, for counting teeth
- Printed pre/post knowledge checks from this packet (one per student, used twice)
- Crunchy-food picture cards (apple, carrot) and soft-food cards (banana, bread) — optional
- A simple tooth chart or drawing of a smile with front, pointy, and back teeth — optional
Procedure
- Pre-check (5 min): hand out the paper knowledge check, read each question aloud, and collect it. Keep the stack — you will compare it with the post-check.
- Warm-up (3 min): everyone smiles at a partner or a mirror. What do you notice? Are all teeth the same shape?
- Explore (5 min): introduce the tooth team — front cutters that bite, pointy tearers that rip, back grinders that mash. Mime biting an apple front-first, then chewing it in the back.
- Count (3 min): with mirrors, students try counting their teeth. Kids have twenty baby teeth — and a wiggly one means a grown-up tooth is coming to take its spot.
- Wrap-up (2 min): why do baby teeth matter if they fall out anyway? They save the spots — like a friend holding your place in line.
- Post-check (5 min): hand out the same knowledge check again. Compare class totals with the pre-check to see the learning — and celebrate it.
Knowledge check — photocopy this page
Give the same check before and after the lesson; class totals before vs. after give you a measurable outcome for reports and grants.
Name: ____________________________ Date: ______________ ☐ Before the lesson ☐ After the lesson
- How many baby teeth do kids have?
- Twenty
- Five
- One hundred
- What do your front teeth do best?
- Mash food up small
- Wave hello
- Bite off pieces of food
- What do your back teeth (molars) do best?
- Grind and mash food up small
- Whistle
- Bite off the first piece
- Why do baby teeth matter if they fall out someday?
- They save the spots for grown-up teeth
- They don't matter at all
- They are made of candy
- What does a wiggly tooth usually mean?
- You should never eat again
- A grown-up tooth is on its way
- Something is wrong
Answer key — teacher page
1. a · 2. c · 3. a · 4. a · 5. b
Sources
- ADA MouthHealthy — Baby Teeth — https://www.mouthhealthy.org/all-topics-a-z/baby-teeth (accessed 2026-07-28)
- ADA MouthHealthy — Eruption Charts — https://www.mouthhealthy.org/all-topics-a-z/eruption-charts (accessed 2026-07-28)
- KidsHealth (Nemours) — Your Teeth — https://kidshealth.org/en/kids/teeth.html (accessed 2026-07-28)
Healthy Smiles. Brighter Futures. · atomicsmile.org/learn
Tooth Explorers
Tonight's healthy habit
Kids have twenty baby teeth, and every one has a job — biting, tearing, or chewing. Baby teeth also save the spots where grown-up teeth will come in, so they need brushing even though they fall out someday.
Try it tonight
At dinner tonight, play "Which tooth did that?" — take a bite and guess together: did the front cutters, the pointy tearers, or the back grinders do the work? Then count teeth in the mirror before brushing.
El hábito saludable de hoy
Los niños tienen veinte dientes de leche, y cada uno tiene un trabajo — morder, desgarrar o masticar. Los dientes de leche también guardan el lugar de los dientes de adulto, así que hay que cepillarlos aunque un día se caigan.
Pruébalo esta noche
Hoy en la cena, jueguen "¿Cuál diente hizo eso?" — den una mordida y adivinen juntos: ¿trabajaron los cortadores de adelante, los puntiagudos o los molinos de atrás? Después cuenten los dientes en el espejo antes de cepillarse.
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