This article discusses the four forms of identifying similarities and differences: comparing, classifying, creating metaphors, and creating analogies and how these strategies can be used in an elementary classroom.

In this video segment from Cyberchase, the CyberSquad must locate a crystal with the highest fraction of orange color.

This lesson plan can be used to help students build the foundation for comparing and contrasting items which will lead to being able to sort key details in text. 

The focus of the Comparing Quantities and Numbers up to Ten intervention has three phases. Phase 1: Use a matching strategy to compare groups of objects. Phase 2: Use a counting strategy to compare groups of objects. Phase 3: Compare written numbers 1 to 10.

The focus of the Comparing Two-Digit Numbers intervention is to use base ten blocks to help compare two two-digit numbers and use the appropriate symbol to record the result.

The focus of the Comparing Two Three-Digit Numbers intervention is using base ten blocks to compare the numbers and then using symbols >, <, =, to record the results of the comparison.

This article provides links to standards-based science and literacy lessons about weather, climate, polar climates, and climate change.

This article discusses the research-based strategy of identifying similarities and differences and provides links to web sites to develop teacher's content knowledge.

Use these Venn diagrams to help support students in learning about fractions. They involve simplifying and comparing fractions with like or unlike denomiators.

This free, online article, developed for elementary teachers, describes a Kindergarten polar science, standards aligned, unit centered on The Polar Express developing literacy, math, and science skills.

This article provides geography lessons to teach elementary students about the polar regions. Literacy extensions are included for each lesson.

This article provides a list of children's literature relating to the geography and characteristics of the Arctic and Antarctica.

This article provides a lesson plan that teaches elementary students to write poems about home using sensory language and imagery. Examples of student work are provided.