Students play and record the “Mary Had a Little Lamb” song using musical instruments and analyze the intensity of the sound using free audio editing and recording software. Then they use hollow Styrofoam half-spheres as acoustic mirrors (devices that reflect and focus sound), determine the radius of curvature of the mirror and calculate its focal length. Students place a microphone at the acoustic mirror focal point, re-record their songs, and compare the sound intensity on plot spectrums generated from their recordings both with and without the acoustic mirrors. A worksheet and KWL chart are provided.

Students learn the two main methods to measure earthquakes, the Richter Scale and the Mercalli Scale. They make a model of a seismograph a measuring device that records an earthquake on a seismogram. Students also investigate which structural designs are most likely to survive an earthquake. And, they illustrate an informational guide to the Mercalli Scale.

This is a presentation for day two of a three-part series on "Implementing a High Quality Resource" with a focus on "Focus and Coherence."Activities Include:Math Assessment Audit DocumentEssential Standards MappingMath Learning Progressions ActivityResources Include:DPI Assessment PageBalanced Assessment GraphicArizona ProgressionsGraham Fletcher Progression VideosAchieve the Core Focus StandardsWilliam McCullam's Coherence Video  

This pre-assessment for Eureka Math can be given to find out what support is needed for implementation. It can also be given after implementation support to determine growth and continued implementation support needed. This can easily be made into a Google Form to make an online version.

Students learn about the anatomical structure of the human eye and how humans see light, as well as some causes of color blindness. They conduct experiments as an example of research to gather information. During their investigations, they test other students' vision, gathering data and measurements about when objects appear blurry. These topics help students prepare to design solutions to an overarching engineering challenge question.