Robert Tenison

I teach chemistry.




King Kekaulike High School

Recent Posts by Robert

Sun Apr 15, 2012 12:30 AM in Acid and Bases
I start my lesson on acids and bases with an explanation of the pH scale and jump straight into a lab where my students use 6 different indicators (universal liquid, bromothymol blue, phenolphthalien, universal paper, blue litmus paper and red litmus paper) to identify the pH of 5 different substances (hydrochloric, carbonic (club soda), water, saltwater, and soap). My students enjoy seeing how t...

Mon Mar 26, 2012 3:46 PM in E Textbooks
I have a similar textbook issue. My school purchased 50 hardcopies of the Chemistry textbook and the rights to use the online copy of the textbook. However, I have 160 students. I use the hardcopies in my classroom, and tell my students to use the online copy for homework, missed work, etc. It is not working. My students want to borrow my classroom books because they do not have access to a co...

Sun Mar 25, 2012 2:04 AM in Sub Plans dilemmia (cross-post from Chemistry)
Laura, I am currently a science teacher, but I was a substitute teacher prior to becoming a teacher, so I understand your dilema. From a substitute's point of view, I always liked to speak to the teacher in advance and see the teachers lesson plans, so I could do a little homework. A copy of the answers to the questisons was always nice. From a teacher's point of view, I suggest explaining/t...

Recent Reviews by Robert

Sun Feb 26, 2012 8:39 PM
5 Atomic Structure and Chemical Bonding
Upon completion of the SciPacks, "Chemical Reactions" and "Atomic Structure", I ventured into the SciGuide associated with the SciPacks and found a treasure chest of useful science teacher resources. The guide is divided into 3 main themes: interaction of matter, description of matter and classification of matter. Each theme is further broken down into four subthemes. To learn about a topic, I simply clicked on the theme/subtheme and a collection of worksheets, lab activities, games, websites, tutorials, and animations were at my fingertips. For me, I am always looking for supplementary materials to use as guided practice and for innovative lab ideas. For example, when I clicked on balancing equations, there was an activity where the students use color coded index cards with the reactants, products and coefficients to balance equations in a cooperative learning setting. Another example lab activity used a copper sulfate solution to determine percent yield and relative error. Each topic has mulitple resources to assist any teacher wiling to search and print the resources. I was highly impressed with the quantity and quality of the resources in the SciGuide. In additioin, I was happy to find everything well organized and arranged in one place, so I can pin point the things useful to me. I will use the SciGuide in my lesson preparation and I will recommend it to other teachers.