Total Duration: 
61 to 90 Minutes 
Materials and Resources: 
Calculator Pencil Ruler Graph paper Notebook paper Colored pencils 
Technology Resources Needed: 
Student digital devicelaptop/tablet (if available) Teacher computer with internet capabilities Interactive Board or projector "50 ft. tides in Burntcoat Head Park, Nova Scotia" Video Clip (0:47 minutes) "NOAA Tide Predictions" website "Create A Graph" website for extension activity 
Background/Preparation: 
The teacher and students should understand that while currents, tides, and waves are related, there are key differences between these natural oceanic occurrences. Currents are large bodies of water that move in a specific direction within the ocean. Currents are mainly caused by differences in the density of ocean water. Tides are the regular rise and fall of ocean water, caused by the effect of gravity from the sun and moon. Waves are movements of the ocean surface, usually caused by the wind. In addition, students should be able to recognize and identify moon phases, as well as the positions of the Earth, moon, and sun during each phase. Students should also have experience in creating a line graph based on a data table. 
Before Strategy/Engage: 10 minutes
During Strategy/Explore & Explain: 60 minutes
Note: Depending on the students' abilities and experience in creating line graphs, the teacher may want to specify the graph intervals. Alternatively, the teacher could provide a graph prelabeled with appropriate intervals. After Strategy/Explain & Extend: 20 minutes

Attachments: **Some files will display in a new window. Others will prompt you to download. 
Assessment Strategies 
The teacher will informally assess students as they complete the data table and line graph to ensure students are recording and graphing information correctly. The teacher will formally assess students during the After Strategy as students complete the "Tidal Pattern Reflection Questions" handout. The teacher can count this assessment as a course grade or use this reflection handout to facilitate a class discussion on the implications of the graph. 
Acceleration: 
Students who meet the Primary Learning Objective can use their completed "Tidal Pattern Data Table" to create a virtual graph using the following website: "Create A Graph". Students can compare their virtual graph to their paper graph by answering the following question: What are the advantages and limitations of each graphical representation? 
Intervention: 
Students who struggle with the graphing portion of this lesson may be partnered with a student who excels in math in order to receive support as they create the graph. The teacher should also provide support as these students work to complete the graphic portion of this lesson. The teacher could provide a completed data table for struggling students. In addition, rather than requiring the student to create the entire graph, the teacher could provide a graph with the axes and intervals already labeled. 
View the Special Education resources for
instructional guidance in providing modifications and adaptations
for students with significant cognitive disabilities who qualify for the Alabama Alternate Assessment.
