Photosynthesis introduces students to the process by which plants make food. Students will learn the steps of this process and discover that the air they breathe is a direct result of photosynthesis. Without it, there would be no oxygen for people, or any other living thing for that matter, to survive. Students will be able to demonstrate their knowledge in different ways through the worksheets at the end of the lesson.

There are several suggestions in the “Options for Lesson” section that you may want to use for your class. For instance, you can use the homework and practice worksheets as quizzes if you want to. You could also take students outside as you deliver the lesson. As another alternative or additional activity, you may choose to have students grow their own plants.

What our Photosynthesis lesson plan includes

Lesson Objectives and Overview: Photosynthesis is an excellent lesson for students in 1st through 3rd grade. It introduces this amazing natural process and provides students with a basic foundation of understanding. Students will define photosynthesis and be able to explain that this process is how plants make their food. They will also recognize that through this same process, plants convert carbon dioxide into oxygen. The worksheets in this lesson will help students solidify what they learn.

There are two pages of instructional content. The lesson first describes the process step by step. Students will learn how plants take in sunlight as energy as well as carbon dioxide. Then the plants make oxygen and release it into the air. Students will discover that a chemical inside the plant called chlorophyll traps the sun’s energy. And the chloroplasts inside that chemical combine everything to create food for the plant.

Students will thus discover why animals can receive energy from consuming plants. Plants use this process to create food, but animals and humans benefit from the process for more than just food. Without the oxygen plants emit, everything would simply die.


The activity worksheet provides students an opportunity to color in a blank picture that represents the process of photosynthesis. There are already labels on the figure, but students will color each step of the process.


For the practice worksheet, students will refer to four different sets of word banks. There are four short paragraphs with missing words. Students will use the word bank above each paragraph and fill in the correct terms.


The homework assignment is essentially the opposite of the activity. The worksheet provides a colorful picture that represents photosynthesis. There are sentences around each part of the picture where a label belongs. Students must fill in the blanks in these sentences that describe the right label, such as water, oxygen, or light.

Additional information


1st Grade, 2nd Grade, 3rd Grade



State Educational Standards

LB.ELA-Literacy.RI.1.2, LB.ELA-Literacy.RI.1.7, LB.ELA-Literacy.RI.2.2, LB.ELA-Literacy.RI.2.7, LB.ELA-Literacy.RI.3.2, LB.ELA-Literacy.RI.3.7

Lessons are aligned to meet the education objectives and goals of most states. For more information on your state objectives, contact your local Board of Education or Department of Education in your state.