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iRubric: Gram Staining Lab rubric

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Gram Staining Lab 
Rubric Code: X88CB5
By anolletti
Ready to use
Public Rubric
Subject: Biology  
Type: Assessment  
Grade Levels: 9-12

Powered by iRubric Gram Staining Lab
  Excellent

4 pts

Good

3 pts

Fair

2 pts

Poor

1 pts

Difference between Gram + and -

Excellent

Student successfully describes the cell wall structure of both gram positive and gram negative bacteria.
Good

Student describes the cell wall structure of both gram positive and gram negative bacteria, but neglects some important details.
Fair

General difference of gram positive and gram negative bacteria mentioned.
Poor

Student does not understand the difference between gram positive and gram negative bacteria
Beta-lactam Antibiotics

Excellent

Student mentions: structure of peptidoglycan, mode of action of b-lactam antibiotics (inhibition of NAM-NAG crosslinking), and that gram positive rely more on their thick layer of peptidoglycan for survival
Good

Student shows 1-2 misconceptions about B-lactam antibiotics and the importance of gram staining.
Fair

Student shows 3-4 misconceptions about B-lactam antibiotics and the importance of gram staining.
Poor

Student shows 4+ misconceptions about B-lactam antibiotics and the importance of gram staining.
Microscope Drawing

Excellent

Microscope drawing includes: title, scale, cell arrangement and cell shape
Good

Microscope drawing includes: title, scale, cell arrangement and cell shape, but 1-2 errors may exist within these criteria
Fair

Microscope drawing is missing one of the following: title, scale, cell arrangement and cell shape, and/or some errors may exist within these criteria
Poor

Microscope drawing is missing one of the following: title, scale, cell arrangement and cell shape, and/or many errors may exist within these criteria
Bacteria Cell Size

Excellent

Calculations are correct to yield a cell size of about 0.5um to 5um
Good

Calculations are correct to yield a cell size of about 0.5um to 5um, but errors exist
Fair

Calculations are incorrect and do not yield a cell size of about 0.5um to 5um, but student shows some understanding of cell size calculations
Poor

Student shows little to know understanding of determining bacteria cell size
Quality

Excellent
Good
Fair
Poor




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