Subject: Chemistry
1. Topic-
Accuracy and Precision in Science
 
2. Content-
Accuracy, Precision, Significant Figures, Lab Techniques
 
3. Goals: Aims/Outcomes-
1.Students will understand the importance of accuracy and precision in the lab setting.
2. Students will gain an understanding of which piece of lab equipment is the most accurate and precise.
3. Students will demonstrate their understanding of significant figures in their lab report.
 
4. Objectives-
1.Students will apply their knowledge of accuracy and precision in the lab setting and complete a lab write up to be assessed.
2. Students will conduct an experiment to determine which piece of lab equipment is the most accurate and precise. This will aid in their success in future experiments.
3. Students will assess their lab technique and evaluate any errors they may have caused in their data.
 
5. Materials and Aids-
Copy of Accuracy and Precision Lab (attached), Lab Equipment (beakers, flasks, burrets, graduated cylinders, water, balances, etc.)
 
6. Procedures/Methods-

A. Introduction-

1.PSAE Wednesday activity incorporating OWL strategy.
2.Review significant figures and accuracy and precision
3.Discuss lab procedure and protocol
 

B. Development-

1.Demonstrate accuracy and precision with "darts"
2.Model proper use of lab equipment
3.Model how to read measurements from buret, graduated cylinder, and beaker
 

C. Practice-

1. Sample significant figure problems
2. Sample problems for reading the water level in buret, graduated cylinder, and beaker
 

D. Independent Practice-

1.Students will perform the lab experiment as instructed.
2.Students will analyze their collected data for accuracy and precision.
3.Students will analyze class data and evaluate sources of error.
 

E. Checking for understanding-

1. Students will practice by completing sample problems before the lab. Instructor will assess progress.

2.Instructor will monitor the lab area and address questions. Informal assessment of student understanding can be made at this time.

3.Students will turn in their completed lab report and it will be graded to assess understanding.

 

F. Closure-

1.Class data will be collected on the board and we will discuss the results.
2.The class will collectively conclude which measuring device is the most accurate and precise.
3. Any students that finish their lab report early may begin working on their online homework assignment (Quia 3-2).
 
7. Evaluation-
1.Lab reports will be graded to assess understanding.
2.Instructor will self-reflect after the lesson to determine points of weakness and strength.
 

This Lesson Plan is available at (www.teacherjet.com)