1. ### Exploring the Ratio of Circumference to Diameter

• Resource ID: TEKS12_MATH_07_003
• Grade Range: 7
• Subject: Math

This activity provides an opportunity for students to explore the ratio of the circumference of its circle to the length of its diameter in order to generalize the ratio for pi.

2. ### Area of Triangles, Parallelograms, and Trapezoids

• Resource ID: TEKS12_MATH_06_002
• Grade Range: 6
• Subject: Math

These activities provide an opportunity for students to explore the area formulas for triangles, trapezoids, and parallelograms.

3. ### Reflections

• Resource ID: TEKS12_MATH_07_001
• Grade Range: 8
• Subject: Math

These activities provide an opportunity for students to explore reflections both on and off of a coordinate plane.

4. ### Translations

• Resource ID: TEKS12_MATH_07_002
• Grade Range: 8
• Subject: Math

These activities provide an opportunity for students to explore translations both on and off of a coordinate plane.

5. ### Dilations

• Resource ID: TEKS12_MATH_08_001
• Grade Range: 8
• Subject: Math

These activities provide an opportunity for students to explore dilations both on and off of a coordinate plane.

6. ### How Do We Quantify the Building Blocks of Matter?

• Resource ID: R4SCI0017
• Grade Range: 10–12
• Subject: Science

This resource provides flexible alternate or additional learning opportunities for students learning about the mole concept, Chemistry TEKS (8)(A).

7. ### Energy Transfer Through Food Chains

• Resource ID: R4SCI0019
• Grade Range: 1
• Subject: Science

A Tier I life science instructional resource for grade 1.

8. ### Investigating and Comparing Life Cycles

• Resource ID: R4SCI0020
• Grade Range: 3–5
• Subject: Science

A Tier I life science instructional resource for grade 3

9. ### Texas Performance Standards Project

• Resource ID: GT001
• Grade Range: K–12
• Subject:

These videos introduce the Texas Performance Standards Project (TPSP), a resource for providing differentiated instruction to gifted/talented (G/T) students.

10. ### Cell Homeostasis: Osmosis

• Resource ID: R4SCI0021
• Grade Range: 9–12
• Subject: Science

The focus of this resource is cell homeostasis and, more specifically, osmosis. Students investigate the concept through a virtual lab, recording and analyzing data, creating sketches to represent vocabulary, and discovering the role of aquaporins in water transport through the cell membrane.

11. ### Objects in Motion

• Resource ID: R4SCI0023
• Grade Range: 9–12
• Subject: Science

This resource provides flexible alternate or additional learning activities for students learning about the concepts of distance,  speed, and acceleration. IPC TEKS (4)(A)

12. ### Newton's Three Laws of Motion

• Resource ID: R4SCI0024
• Grade Range: 9–12
• Subject: Science

This resource provides alternate or additional learning opportunities for students learning the three Newton's Laws of Motion. It includes a collection of interactive materilas, videos, and other digital media. Physics TEKS, (4)(D)

13. ### Increasing and Decreasing Energy

• Resource ID: K4SCI002
• Grade Range: 2
• Subject: Science

This resource provides sample activities for teachers to use in helping students to identify and investigate the effects of increasing and decreasing amounts of light, heat, and sound energy on an object.

14. ### Weathering and Decomposition

• Resource ID: R4SCI0025
• Grade Range: 3
• Subject: Science

A Tier 1 earth science instructional resource for grade 3

15. ### Soil

• Resource ID: R4SCI0026
• Grade Range: 1
• Subject: Science

A Tier 1 earth science instructional resource for grade 1.

16. ### What’s Trending with the Elements?

• Resource ID: R4SCI0027
• Grade Range: 10–12
• Subject: Science

This resource, aligned with Chemistry TEKS (5)(C), provides alternative or additional tier-one learning options for students using the periodic table to identify and explain trends.

17. ### Food Chains, Food Webs, and Energy Pyramids

• Resource ID: R4SCI0028
• Grade Range: 7
• Subject: Science

This resource provides flexible alternate or additional learning opportunities for students to diagram the flow of energy through living systems, Seventh Grade Science TEKS (7)(5)(C).

18. ### The Arrangement of Elements: The Periodic Table

• Resource ID: R4SCI0029
• Grade Range: 8
• Subject: Science

This resource provides flexible alternate or additional learning opportunities for students to interpret the arrangement of elements on the Periodic Table, Eighth Grade Science TEKS (8)(5)(C).

19. ### Sedimentary Rocks and Fossil Fuels

• Resource ID: R4SCI0030
• Grade Range: 5
• Subject: Science

A Tier 1 earth science instructional resource for grade 5.

20. ### Light: Reflection and Refraction

• Resource ID: R4SCI0031
• Grade Range: 5
• Subject: Science

This is a tier I instructional resource to provide a scaffolded learning experience for TEKS (5)(6)(C).