Cornstarch+Lab+Demonstration+and+Assessment

Cornstarch Laboratory Demonstration Video: []

Procedure

1. Complete the "Liquid or Solid?" Lab as per your course syllabus for Lesson 1.

2. Access the blog: bgoldstein29.blogspot.com and view the video, "Cornstarch and Water Demonstration". 3. Answer the questions under "Cornstarch Lab Assessment".

4. Post these answers into your lesson assignments either online or by regular mail. Post these assignments under "comments" on the cornstarch and water demonstration video on the blog to receive extra credit.

5. Compare your own laboratory experience with what you viewed on the demonstration video and add this comment to your replies. The question is: 5. "How do your own lab results compare to the results you viewed on the demonstration video?"

Rubric for the Authentic Assessment activity (This is a performace based assessment - conducted online)

The authentic assessment activity consists of the question answers as above and what your actual experience was with the cornstarch water activity. It will be graded as follows: percent of grade 1. Did the student answer all 5 questions in a manner that could be easily understood by the instructor? 20%

2. Was the result of the student experiment realistic, and, if not, did the student include an explanation for any negative results (like the cornstarch was too wet because I added too much water - therefore it never acted like a solid)? 20%

3. Were the student observations for the behavior of the mixture carefully described? 20%

4. Did the student's results consult the subject of the study? (The subject was to differentiate materials as either solid or liquid? 20%

5. Was the comparison of the video and the student laboratory activity competed and was there a comment about similarity or difference to the results? 20%