The fist lesson plan can be found at http://www.lessonplanspage.com/MathExploringSlopes912.htm. This website is very helpful in teaching how to calculate slope to beginner algebra students. This plan facilitates the learning process for students, because it not only guides the teacher to demonstrate the method, but it also guides teachers to relate the process to real world situations that students can readily understand.
The second lesson plan can be found at http://www2.scholastic.com/browse/search/?_N=407&isBrowse=Y&Ne=658&Nr=OR(Resource_Type:Lesson%20Plan,Resource_Type:Informal%20Lesson%20Article,Resource_Type:Unit%20Plan)&N=407+673. This plan provides a clearly developed path for teachers to follow in teaching the science of sound to middle school students. It is effective, because it provides several examples of activities and games that teachers can use to keep the learning process fun, while keeping the experience educational.