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In this math lesson, learners count and compare amounts of money less than or equal to one dollar.

In this activity, learners discover how NASA engineers develop experimental aircraft.

In this activity (on page 1), learners role play as atoms to explore how atoms can be rearranged to make different materials.

In this math lesson, learners participate in a variety of activities that give them experience in recognizing, describing, and extending repeating and arithmetic patterns.

In this activity, learners explore the factors that tend to resist changes in pH of the ocean and why the ocean is becoming more acidic.