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Guest Speakers in the Middle School Classroom | Posted in Next Generation Science Standards
I teach 7th grade life science from 8:40a-2:20p and have about 8 guest speakers a year.
I have found that most guest speakers are willing to stay all day and repeat themselves!! I usually provide them with water and lunch/snacks.
I have found that most guest speakers do not provide notes for students to take, so I ask for their PowerPoint before they come in order to create a student handout. My students are much more engaged when they have something to follow and take notes on.
Go for it! Guest speakers enrich the unit and experience!
Teaching for Conceptual Understanding in Science | Posted in Professional Development
Currently, I am entering my 4th year of teaching 7th and 8th grade science. I’ve always felt that the traditional lecture format my department employs is not the most effective way to reach my students. I’ve added numerous lab activities in an attempt to promote deeper understanding. However, it wasn’t until I stumbled across this thread and read about conceptual understanding that I felt like this is the method that I should have been using all along. The shift to NGSS blends perfectly with this style of instruction and learning. I agree with Joyce in regards to covering the curriculum. We tend to sacrifice depth of learning in favor of squeezing everything in before the next round of state testing begins.
I have read and reviewed many of the resources provided in your book “Teaching for Conceptual Understanding in Science.” I felt the different instructional strategies listed in chapter 8 were extremely beneficial. I’m left with a few lingering questions though. Based on what I’ve read, teachers need to administer some sort of probe or pre-assessment to gauge students’ misconceptions or prior knowledge before planning instruction. Are these probes supposed to take the entire class period? If not, then how do you plan the day based on information you are gathering in a 15-20 minute time span? Using the conceptual thinking model how are teachers providing instruction for concepts that are completely unfamiliar to students?
The Drake Equation | Posted in Earth and Space Science
The Drake equation is not directly used by scientists in their research. Rather it is often used when talking about life in the universe to non-scientists, such as in astrobiology courses, as James mentioned. One of the keynote addresses I sometimes deliver is on astrobiology, and I discuss the Drake equation quite a lot, as it relates to many fascinating topics regarding the development of life in the universe, where we would expect to find life, and how common we might expect life to be.
The purpose of the Drake equation is not to give a precise answer to that fundamental question -- How many technological civilizations are in our galaxy? -- but to form the basis of discussions by presenting various types of information that we would need to know, if we wanted to answer that question.
So basically the Drake equation is a statement that "stimulates intellectual curiosity about the universe around us, for helping us to understand that life as we know it is the end product of a natural, cosmic evolution, and for helping us realize how much we are a part of that universe." (https://www.seti.org/drakeequation)
What the equation and the search for life has done is focus science on some of the issues concerning life in the universe, specifically the development of life starting with chemical processes, the development of multi-cellular life, and the development of intelligence.
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