Grade 3ScienceTEKS 3.12C

Grade 3 Science TEKS 3.12C:Environmental Changes and Organisms

Free, teacher-ready lessons and worksheets for Environmental Changes and Organisms in Grade 3 Science, fully aligned to Texas TEKS 3.12C.

Describe how natural changes to the environment such as floods and droughts cause some organisms to thrive and others to perish or move to new locations

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      Grade 3 Science TEKS Lessons

      TEKS 3.12C: Environmental Changes and Organisms

      • Floods & Droughts

        About this lesson

        Learning Target: I can explain how organisms thrive, perish, or move to new locations in floods and droughts.

        Focuses On:

        • Organism thrive, perish, or move to new locations in floods and droughts

        Builds On:

        This is the first time students are introduced to the concept that not all organism can survive in all environmental conditions.

        Next Level:

        6.13C:

        describe how variations within a population can be an advantage or disadvantage to the survival of a population as environments change

        Read More:

        This lesson is designed to support students' understanding of how animals respond and behave during floods and droughts.


        The lesson begins by examining the types of organisms that thrive in these conditions. It then covers the types of organisms that perish, and finally, those that move to new locations.


        This is the first time students are introduced to this topic. It prepares them to understand that certain traits can be advantageous or disadvantageous for survival, as covered in 6.13C.

        Grade 3ScienceTEKS 3.12C

      Grade 3 Science TEKS Worksheets

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      Frequently Asked Questions

      How do you teach Environmental Changes and Organisms to 3rd graders?

      To teach Environmental Changes and Organisms to 3rd grade Science students, anchor the concept in a hands-on investigation or real-world phenomenon, then build academic vocabulary and scientific reasoning through guided practice. TEKS 3.12C asks students to describe how natural changes to the environment such as floods and droughts cause some organisms to thrive and others to perish or move to new locations. Crystal Instruction's free ClearLessons for 3.12C walk through this progression with modeling, guided practice, and built-in checks for understanding, while the ClearSheets provide scaffolded practice. You can download both free on this page.

      What is 3.12C in 3rd grade Science?

      TEKS 3.12C is a 3rd grade Science standard for Environmental Changes and Organisms. It requires students to describe how natural changes to the environment such as floods and droughts cause some organisms to thrive and others to perish or move to new locations. It is part of the Texas Essential Knowledge and Skills (TEKS) for Grade 3 Science.

      Where can I find free TEKS 3.12C lessons and worksheets?

      You can download free TEKS 3.12C lessons and worksheets directly on this page — no login or account required. Crystal Instruction provides free PDF versions of our Environmental Changes and Organisms ClearLessons and ClearSheets for Grade 3 Science, and each one is also available as an interactive lesson inside the full Crystal Instruction platform.

      What skills are included in 3rd grade Environmental Changes and Organisms?

      TEKS 3.12C (Environmental Changes and Organisms) covers the following 3rd grade Science skills: students learn to describe how natural changes to the environment such as floods and droughts cause some organisms to thrive and others to perish or move to new locations. Free resources for this standard include Floods & Droughts.

      Are TEKS 3.12C resources aligned to STAAR?

      Although Grade 3 Science is not directly tested on the Texas STAAR test, TEKS 3.12C builds the foundational skills students need for later STAAR assessments. Every Crystal Instruction ClearSheet for 3.12C is STAAR-aligned, and our ClearLessons are built to STAAR rigor using released STAAR test items, so students practice Environmental Changes and Organisms at the depth STAAR expects.