• Resource ID: TEKS12_MATH_03_001
• Grade Range: 3
• Subject: Math

### Determining the Perimeter of a Polygon (Series and Activity 1)

This activity provides an opportunity for students to investigate the perimeter of polygons.

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

### Weathering and Decomposition

A Tier 1 earth science instructional resource for grade 3

• Resource ID: R4SCI0052
• Grade Range: 3
• Subject: Science

### Exploring Energy

A Tier 1 energy instructional resource for grade 3.

• Resource ID: R4SCI0059
• Grade Range: 3
• Subject: Science

### Forces at Work

A Tier 1 force and motion instructional resource for grade 3

• Resource ID: E_MSTAR001
• Grade Range: 2–8
• Subject: Math

### ESTAR/MSTAR

The ESTAR/MSTAR Universal Screeners and Diagnostic Assessments are a formative assessment system administered to students in grades 2–8 to support instructional decisions in mathematics.

• Resource ID: ELPS-IT01
• Grade Range: 3–12
• Subject: ELL Support

### ELPS Instructional Tool

The ELPS Instructional Tool outlines how to plan focused, targeted, and systematic instruction to meet the linguistic needs of ELLs identified at the beginning and intermediate proficiency levels in grade 3 or higher.

• Resource ID: T2T06
• Grade Range: 2–5
• Subject: Math

### Measurement: Converting Units of Measure

Measurement: Converting Units of Measure

• Resource ID: T2T05
• Grade Range: 2–5
• Subject: Math

### Building to Measurement with a Ruler

Building to Measurement with a Ruler

• Resource ID: T2T04
• Grade Range: 3
• Subject: Math

### Addition and Subtraction Grade 3

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

### Investigating and Comparing Life Cycles

A Tier I life science instructional resource for grade 3

• Resource ID: ES001
• Grade Range: 3–4
• Subject: Math

### ESTAR II Intervention Modules

ESTAR II intervention modules are designed for students in grades 3 and 4. A total of eight modules containing lessons, student books, and teacher masters are available for download.