Lesson Plan Template: Guided or Open Inquiry
Learning Objectives: What will students know and be able to do as a result of this lesson?
Students will be able to develop a systematic plan for adjusting the temperature and turbidity level of coffee to make it “just right”.
Student will be able to use probeware/sensors to gather data and create a table to organize the data.
Students will be able to write code that utilizes probeware/sensors as data gathering tools.
Students will be able to communicate their procedure and results in writing.
Prior Knowledge: What prior knowledge should students have for this lesson?
Students should have already worked through lesson 1 & 2 of the unit. Students should have some knowledge of temperature, turbidity and have experience with science lab investigations. Students should also have some basic knowledge of using block coding in Scratch to display different Sprites and different words on the screen based on variables. Students should be familiar with inequalities <, > and also the equal sign.
Guiding Questions: What are the guiding questions for this lesson?
How can we systematically adjust the temperature of a liquid to make it “just right”?
How can using probeware/sensors and code make this process more efficient?
Introduction: How will the teacher inform students of the intent of the lesson? How will students understand or develop an investigable question?
Tell the students that Goldilocks now knows that coffee that is “just right” has a perfect temperature and turbidity level. (NOTE: the coffee does not need to be hot, please use a temperature that is appropriate for your students for safety reasons. Also be sure to provide creamers, full strength and diluted for this lab.)
Provide the worksheet to the students and read over the challenge. Make teams of students depending on the number of computers and probes/sensors available. Have students work through the plan on how to set up an investigation that allows a systematic approach to getting the “just right” temperature and turbidity. Students should be using knowledge from lesson 1 and lesson 2 to make this challenge easier.
Focus on the coding plan in that the code must account for both sensors at the same time. Discuss how to use nested loops of IF/ELSE and the AND logic function. See sample code script. Allow students to talk with other teams and perhaps verify their plan with the teacher before moving forward with the coding plan. Students should realize they will need to merge their prior code and/or the concept of that code.
Depending on the level of coding skill, the coding part can be done by each team, allowing for diversity in code, or the teacher can decide to walk the students through this part of the worksheet and Scratch. The minimum code at this point is to have the probeware produce a temperature/turbidity reading and say “just right”, “too low” or “too high”.
Investigate: What will the teacher do to give students an opportunity to develop, try, revise, and implement their own methods to gather data?
Students must first try their code and make sure it works with the temperature probe and turbidity sensor. Provide all students will room temp water and make sure that all their code displays approximately the same temperature before they begin their investigation. Do this for a sample of turbid water as well. Once students are ready, provide them with the time and materials that are needed to alter the temperature and turbidity. It is suggested to provide the students with warm, room temp and cool water depending the target temperature that you tell them is “just right”. Provide them with diluted and regular creamer as well. Students should be able to have pipets, graduated cylinders, beakers or other material to safely hold the coffee in so it does not spill with the temperature probe is placed in the coffee. Be sure the coffee you are giving the students is not already the target temperature or turbidity level.
Analyze: How will the teacher help students determine a way to represent, analyze, and interpret the data they collect?
Students will collect the data on the worksheet and organize the data to show the systematic procedure that was used. Students may need scaffolding and guidance on how to organize their data, however allow for some flexibility in this step which relates to their procedure. Students will use their code and the probe to gather data.
Closure: What will the teacher do to bring the lesson to a close? How will the students make sense of the investigation?
The whole class should come back together to discuss the results and how each team may have approached the task differently and how they may have had to adjust their plan in the middle of the investigation. A discussion on how systematic and perhaps smaller amounts were key to this investigation so the temperature/turbidity didn’t go past the target too quickly. Comparing the different code is important for students to see multiple solutions.
The summary section on the worksheet along with the code created in Scratch can be used to assess the students.
Throughout the lesson the students should be asked probing questions and stopped periodically to make sure they are progressing smoothly. Each team could possibly have different procedures and this should be encouraged. Important stopping points would be after the students create their plan. Students can either conference with the teacher or other groups to receive constructive feedback. Students should have a preliminary plan for their code, before allowing the lab investigation to begin the code should be correct in Scratch. Students should do a “test” using a sample and compare their reading to that of other groups to make sure the sensor is working as expected. Students should make sure that they also have initial readings taken before they start collecting data. Teachers should look at the data periodically to make sure students are recording the correct data.
Feedback to Students
Students should receive feedback throughout the investigation from the teacher and peers. Peer interaction to improve procedure and debug code is imperative to help make stronger problem solvers. Be sure to provide feedback to the plan and to the code before allowing students to start their investigation. A trial sample to check the sensor is needed for the students to make sure their code is working as expected.