I will conduct this lesson with the help of videos, pictures, and worksheets. The lesson requires the use of PowerPoint presentations in order to successfully present the students with an attractive layout. This mode of teaching helps the students in voicing their concerns as well as looks to involve a high degree of student involvement in the lessons. The performance of students is assessed with the use of quizzes, assignments, and comprehensive exams.
November 28, Most middle and high school science laboratories produce chemical hazardous waste, but what exactly is it, and how do you dispose of it appropriately? Chemical waste is a substance that poses a hazard to human health or the environment, including toxins, corrosive liquids, and organic solvents.
Both would ultimately reduce the amount of chemical hazardous waste. The Environmental Protection Agency defines hazardous waste as a waste that is ignitable, corrosive, reactive, or toxic.
Examples include acetone, ethanol, ethyl ether, hexane, and methanol.
Examples include strong acids with pH less than 2 or strong bases with pH higher than Examples include picric acid, dinitro and trinitro compounds, and ethers with peroxides.
Getting started The first step in disposing of chemical hazardous waste involves determining its location. Usually, chemistry laboratories produces waste, but biology laboratories may also produce biological or medical waste as the result of biotechnology and microbiology course work.
The second step involves determining whether the waste is hazardous or nonhazardous. This will dictate how to handle the waste. In addition, all waste containing chemical solids, liquids, or containerized gases should be treated as hazardous chemical waste.
Spilled chemicals and materials used to clean them up are hazardous waste. In addition to stock chemicals, items containing chemicals e.
Spend time planning and preparing for the activity.
Select laboratory activities that are tailored to your science standards: If the reactants or products require special disposal or create unique hazards, then modify the experiment to use safer materials.
These reduce waste, save on resources, and reduce preparation time. Know and review the federal, state, and local regulations for disposal of the chemicals involved. Incorporate disposal instructions into your laboratory activity.
By making waste disposal a routine in every activity, students will develop a culture of concern for the environment and accept it as part of their responsibility.
Many laboratory explosions have occurred from inappropriate mixing of wastes, such as mixing nitric acid waste with organic wastes, so be sure that waste materials are compatible. Mixing nitric acid with any organic materials may result in an over pressurization of the waste container and release of the chemical into the workspace.
Collect all compatible waste solutions with similar properties in a centrally located, well labeled container. Dispose of waste immediately, following the regulations appropriate for your area.
Disposal of small amounts of waste is easier and quicker than disposal of larger, stockpiled amounts. The following is a suggested safety disposal protocol that can help you dispose of hazardous lab chemicals. Glastonbury Public Schools CT Laboratory Waste Disposal Safety Procedure Introduction Over the past few years, waste-reducing strategies in science labs have been adopted to reduce the amount of hazardous chemical waste being produced.
However, to prevent safety incidents resulting from mixing reactive chemical products, science teachers need to be vigilant when disposing and removing solid and liquid waste produced in laboratories. Procedure The following safety procedure will help reduce or eliminate the danger of unexpected reactions and also help foster proper waste disposal: Appropriate waste containers should be made available in the labs to prevent cross contamination of chemical products from lab activities.
The use of each container will depend on the number of students and how many times the same lab is conducted. These plastic containers with lids need to be HDPE-rated High-density polyethylene as chemical resistant.
The containers are to be labeled and color coded for liquid chemical waste or solid chemical waste. Before the end of each class period, students must return any chemicals excess reagent, product, or waste to the appropriate location, or dispose of them as instructed by their teacher in chemical waste disposal containers.
For instructions on disposal of specific hazardous chemicals, check out: Each hazardous waste container from the lab needs to display the following information. This information can be completed by the teacher or lab paraprofessional.Camila Barrera – Lissete Gajardo – Milenka Gutiérrez – Alejandro Moreno SIOP LESSON PLAN TEMPLATETime: Lesson Sequence Notes regarding differentiation(45 min) First Class If any student has a problem to2 minutes - Presentation of the objectives to the class.
Using SEI Strategies in a SIOP Lesson Plan Mandy Wynne Grand Canyon University: ESL Advanced Principles of SEI Instruction and Assessment Sep 24, (O) October 21, Using SEI Strategies in a SIOP Lesson Plan This lesson should be taught in a sixth grade class.
Test information. 10 questions. 10 minutes. This is just one of many free SAT grammar tests available on attheheels.com See the SAT grammar page for directions, tips and more information. Lesson plans and materials were infused with instructional features of the SIOP Model including language objectives, explicit vocabulary instruction, student interaction, building background knowledge, and comprehensible input.
Sheltered Instruction Observation Protocol (SIOP) SIOP is a researched based lesson delivery model that links Content Objectives to Language Objectives.
There are 8 components to SIOP along with 30 SIOP features. The 8 components of the SIOP lesson protocol are similar to a lesson plan . Using SEI Strategies in a SIOP Lesson Plan 2 Now that the chart is done and we have gone over what is on the chart as a class have them that now they will label the different parts of the dragonfly and then when done have them write a sentence about 1 important fact that they have learned about the dragonfly.