Using this resource group, teachers can focus on the topic of number sense and computation by having students make estimates to analyze the number of apples per acre. Students learn to take samples and use benchmarks to make reasonable estimates. This resource group is part of the *Mathline Elementary School Math Project.*

In this professional development video, teachers can focus on the topic of number sense and computation by creating equivalent fractions that represent one-half through the use of geoblocks. This video can be used in conjunction with the *To Half or Half Not* Lesson Plan.

Using this resource group, teachers can focus on the topic of patterns and relationships. Students learn to recognize, describe, create and extend repeating and arithmetic patterns. This resource group is part of the *Mathline Elementary School Math Project.*

Using this resource group, teachers can focus on the topic of statistics. Students research and classify animals of the temperate forest; make a circle graph; collect, display (using a bar graph or line plot), interpret, and analyze a set of data. This resource group is part of the *Mathline Elementary School Math Project.*

In this professional development video, teachers focus on the topic of geometry by having students arrange pattern blocks to create tessellations and explore geometric patterns. This video can be used in conjunction with the *Tiling the Plaza* lesson plan.

Using this resource group, teachers can focus on the topic of patterns and relationships by having students create, extend, and describe arithmetic patterns found in floral table designs. This resource group is part of the *Mathline Elementary School Math Project.*

In this professional development video, teachers focus on the topic of probability by identifying the likelihood of an event based on a set of data relating to mystery spinners. This video can be used in conjunction with the Chances Are (Part 3) lesson plan, as well as the Chances Are parts 1 and 2 videos and lesson plans.

Using this resource group, teachers can focus on the topic of probability by having students identify the likelihood of an event using a walk-on probability scale. Students learn to describe events that are certain, impossible, likely, and unlikely to occur. This resource group is part of the *Mathline Elementary School Math Project.*

In this professional development video, teachers focus on the topic of measurement by having students estimate and measure in a variety of lab experiments. This video can be used in conjunction with the* It Takes Ten* lesson plan.

In this professional development video, teachers focus on the topic of measurement by having students measure the diameter, circumference, and area of circles made by a bubble print. This video can be used in conjunction with the *Bubble Mania* lesson plan.