Identifying the Layers of the Earth.
This has been one of my favorite lessons so far this year. Not only did it use several great instructional strategies, it produced one thing every teacher loves to hear in their classroom, several ah-has. The lesson began with students think-pair-sharing their ideas of how we can look into things (people, objects, etc) without cutting into them, breaking them open, or being invasive in any way. Students came up with quite a few good answers such as X rays, ultrasound, MRI, and some others. At this point I give the students the objectives of the lesson: what are the layers of the Earth and how do scientists know this? I then asked them what all of the methods they came up with at the beginning of class have in common, the answer being they are all waves. Which them led to the question: what kind of waves have we been working with throughout this unit; the answer being earthquake waves. The goal of the questions leading the students to the realization that scientists can use earthquake waves to identify the layers of the Earth. After watching and commenting on an online animation showing earthquake waves traveling through the Earth I had some students come to the front of the room and model waves with their bodies. During this activity students saw that there was one point at which waves stopped the same as on the online animation. We talked about that point and the students came up with the notion that there must be a liquid layer in the Earth because the earthquake waves stop at some point. That is what elicited several ah-has from the class and made me smile. The lesson concluded with a lecture and showing of animations from a CD while students took notes. This Lesson implemented three Marzano strategies: Setting objectives, note taking, and cues, questions, and advance organizers.
Setting objectives
This came after the initial think-pair-share activity. The objective of the lesson was to identify the layers of the Earth and learn how scientists find this out. Setting objectives is an important part of a lesson in that it can focus the thoughts of students towards the goals. Once students find out they are learning about the layers of the Earth they will begin to think about what they know about the interior of the Earth. Hopefully they will begin to think about what they came up with during the opening discussion and how it may apply towards finding out the layers of the Earth.
Standard S
After the initial warm up activity, I write on the board and explain to them the objectives of the lesson. By the end of class students will be able to identify the layers of the Earth and see how scientists know about these layers. The setting of objectives focuses students thoughts on how scientists might go about finding out the layers of the earth.
Standard T
Setting objectives in this lesson allows students to take the ideas about waves they discussed in the think-pair-share and turn it towards the day’s lesson of identifying the layers of the Earth. Formal assessments occur throughout the lesson in the form of class discussions and probing questions by me.
Summarizing and Note Taking
Notes are an important part of this lesson. There is quite a bit of information being given throughout. Although we will be observing parts of the lesson in a couple of different forms, the main objective is the same: what are the layers of the earth, some of their characteristics, and how do we know this. The class is encouraged to use the Cornell notes method which they have been practicing throughout the year in their language arts class. Ideally, practice in note taking will pay off at the end of unit final as students are better able to study for unit finals. Whatever the format they use I try to emphasis heavily the main points of the lesson to ensure they get them.
Standard S
Note taking allows students to take what they have heard or seen and to put it into their own words. Students are encouraged to personalize their notes using drawings or colors or anything that might help them better understand the content and make it easier to study when the unit final comes around. Aesthetic reasoning comes into play as students are able to use drawing at many points during the lesson.
Standard T
Students are encouraged to personalize their notes in whatever way they think is best. They are informed that they are the ones studying from them and they know best what method of note taking is best for them. This lesson incorporates several learning styles from watching animations, to listening to lecture, to acting out wave properties. These different styles allow different individuals chances to get information in a way they are most comfortable with.
Questions, Cues, and Advance Organizers.
Cues and questions are a key part of this lesson. I use them in the beginning of the lesson to get students thinking about methods of seeing inside of something without actually going inside of it. I also used them to guide students to the realization that there was a similarity between the what we were seeing in the online animation and what they were seeing as the students acted out the waves.
Standard S
My opening question “How can we look into thing without going in cutting open or destroying them?”, students answer during their think-pair-share are meant to get students to think about things they have used or seen in everyday life X rays, ultrasound, MRI, etc. My follow up question is “What do all these things have in common and what have we studied in previous lessons that have the same properties?” These questions are meant to get students thinking about how scientists know what is thousands of miles beneath the Earth’s crust. The use of online animations was a key aspect of this lesson. These allowed me to give students a visual reference to what is happening inside the Earth.
Standard T
This lesson incorporated several different strategies to try and accommodate different student learning styles. The class started with a class discussion. This was followed by some online animations shown on the board about how waves travel through the Earth. Students then used their bodies to model waves travelling through the Earth. The class finished with some class discussion and note taking on what the layers of the Earth are and their characteristics. Using these different teaching methods hopefully allowed the lesson appeal to the different type of learners in the class.
Formative assessment
A short formative assessment is given the next morning after the layers of the Earth lesson. This is for me to see how well the students got the lesson from the day before. Students should be able to name the layers of the Earth and talk about how scientists can know what is going on hundreds and thousands of miles under the crust.
Standard T
Formative assessments satisfy standard T of the SPU standards. Students benefit from the use of formative assessment strategies. Formative assessments allow me to see how well students are doing in a less stressful and more useful manner. Given either at the beginning of a lesson or unit, or after, I can quickly see what I may need to cover again or emphasis more in my next lesson.