Lesson plan Kindergarten Science

Keeping Otter Creek Clean: A Kindergarten Trash-Sorting Lesson

A 30-minute kindergarten lesson where students sort trash from natural objects found near a fictional creek and draw one way to help keep it clean.

Grade: Kindergarten
Subject: Science
Material: Lesson plan
Time: 30 min
Prep: Low prep
Materials: A large drawn or printed picture of a creek with fish, a turtle, and plants, 10-12 picture cards showing trash (a bottle, a wrapper, a can) and natural creek objects (a leaf, a stick, a rock, a fish), Two hoops, boxes, or labeled mats for sorting: 'Belongs in the Creek' and 'Does Not Belong', Drawing paper and crayons

Standards

K-ESS3-3 NGSS

Communicate solutions that will reduce the impact of humans on the land, water, air, and/or other living things in the local environment.

How this material aligns: The sorting activity and the closing drawing task ask students to identify litter as human impact on Otter Creek and communicate a solution, matching this standard's communicate-solutions requirement.

All materials for K-ESS3-3 →

W.K.2 Common Core ELA

Use a combination of drawing, dictating, and writing to compose informative/explanatory texts in which they name what they are writing about and supply some information about the topic.

How this material aligns: Each student draws Otter Creek and dictates or writes one fact or one action that helps keep it clean, the informative drawing-and-dictation task this standard describes.

All materials for W.K.2 →

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This material is in the public domain (CC0) and may be copied, edited, and shared freely, without attribution. Updated 2026-07-16.

Objectives

Students will explain in their own words that litter can hurt the animals living in a creek.
Students will sort picture cards into natural creek objects and litter.
Students will communicate one way to help keep a creek clean through drawing and dictated or written words.

Vocabulary

Key words: litter, creek, sort

Teacher overview

Otter Creek, a fictional creek used for this lesson, runs behind a school and is home to fish, a turtle, and plants growing along its banks. After a windy day, a pile of trash cards and natural-object cards "washes up" for the class to sort, giving kindergartners a hands-on way to see the difference between what belongs in a creek and what does not. A common idea this lesson corrects gently is that litter is only a mess for people to look at; sorting the cards and talking about the fish and turtle helps students connect trash in the water to the animals that actually live there.

The lesson ends with a drawing that doubles as an informative-writing sample, since each student names one fact about Otter Creek or one action that helps keep it clean.

Procedure

Minutes 0-5 -- Meet Otter Creek. Show the large picture of the creek. Ask: "Who lives here?" Point to the fish, the turtle, and the plants as students name them. Introduce the sentence the class will repeat: Otter Creek is home to animals, and clean water helps them stay healthy.

Minutes 5-10 -- What is litter? Hold up one trash card (a bottle) and one natural card (a leaf). Ask students to describe how they are different. Introduce the word litter: trash that ends up somewhere it should not be, like blowing into a creek. Explain that today the class will sort a pile of cards that "washed up" at Otter Creek after a windy day.

Minutes 10-20 -- Sorting activity. In pairs or small groups, students take turns drawing a card from the pile and deciding whether it belongs in the "Belongs in the Creek" hoop (leaves, sticks, rocks, fish, a turtle) or the "Does Not Belong" hoop (a bottle, a wrapper, a can). After each card is placed, ask the group placing it to say one word about why. Circulate and prompt with "Would the turtle recognize that as part of its home?" for any card students are unsure about.

Minutes 20-27 -- Draw and dictate. Each student draws Otter Creek with at least one animal in it, plus one way they could help keep it clean (picking up litter, using a trash can instead of dropping wrappers, telling a grown-up about litter they see). Circulate and scribe a caption for any student who dictates rather than writes.

Minutes 27-30 -- Closure and formative check. Gather the class. Show three cards one at a time (a fish, a bottle, a leaf) and ask for a quick thumbs-up if it belongs in the creek and thumbs-down if it does not; if nearly every student shows the correct thumb on all three cards, the sorting concept has landed and the lesson is ready to close. Repeat the class sentence from the opening one final time.

From Water for Schools (waterforschools.org). This material is in the public domain (CC0) and may be copied, edited, and shared freely.

Answer Key

Sorting check: A fish card. Answer: Belongs in the creek. Fish are natural animals that live in the water.
Sorting check: A plastic bottle card. Answer: Does not belong. A bottle is litter that did not come from the creek itself and can hurt the animals living there.
Sorting check: A leaf card. Answer: Belongs in the creek. A leaf is a natural object that falls from plants growing near the water.

Differentiation

Support

Pre-sort the first two or three cards together as a whole class before releasing students to small groups, and provide a simple picture key (a green check for "belongs," a red X for "does not belong") taped above each hoop. For the drawing task, offer a pre-drawn outline of the creek that students color and add one animal to, rather than drawing the whole scene from scratch.

Extension

Ask confident students to sort a few bonus cards showing trickier objects (a paper cup, a stick with a ribbon tied to it) and explain their reasoning in a full sentence using the word "because." For the drawing task, challenge them to write their caption independently instead of dictating it.

ELL supports

Pre-teach litter, creek, and sort with simple gestures (cupped hands for "creek," a tossing-away motion for "litter") that the whole class practices together. Allow students to complete the sorting activity fully through pointing and placing cards, and accept a one-word caption for the drawing task, such as "trash" or "pick up."

Extensions

Walk the school grounds with a small bag and gloves to pick up any litter near a real drain, ditch, or creek if one is nearby, with adults supervising, students kept well back from the water, and any sharp or broken item left for an adult, connecting the lesson's sorting practice to a place students can actually see. Send the drawing home with a note asking a family member to help the student find one more way their household keeps litter out of storm drains or waterways, and share findings at morning meeting the next day.