Lesson Plan Title – How do you make a carbohydrate?

Discipline and Topic – Biology/dehydration synthesis of carbohydrates

Target Population – High School

Curriculum Links – This unit is on The Chemistry of Life. It deals with basic chemistry such as matter, atoms, and elements. Also, it discusses 3 macromolecules: carbohydrates, fats/oils, and proteins. Before this lesson, students would have learned about matter, atoms, and elements. After this lesson, students would go on to information on carbohydrates, then dehydration synthesis and information about fats/oils, and finally dehydration synthesis and information about proteins.

Objectives – After this lesson, the students will be able to:

- Describe the process of dehydration synthesis

- apply dehydration synthesis to carbohydrates

- use model kits to demonstrate dehydration synthesis of carbohydrates

Media Literacy Objectives –

- Judge the accuracy & completeness of electronic and/or graphical information & support those conclusions

Materials and Timing –

Materials: overhead projector, chemistry model kits, computer lab

Timing: two 45-minute periods

Scope and Sequence –

Day one:

1. using an overhead, I will give the students notes on dehydration synthesis and then relate it to carbohydrates.

- this will include the terms building block, monosaccharide, dehydrate, synthesize, and macromolecule.

2. students will be shown a model of glucose and how to build one

3. students, in groups, will build two glucose models and bond them together through the use of dehydration synthesis

4. students will be required to demonstrate the process of dehydration synthesis, as I go around to each group

Day two:

1. in computer lab, students will look for sites that discuss dehydration synthesis

2. on a worksheet that I give them (see end of lesson plan), students will be required to discuss various aspects of the sites they are viewing

Supplemental Materials – see worksheet at the end of the lesson plan

Evaluation of Students –

Place your objectives in the left hand column, segmenting your objectives and/or adding additional rows, if necessary. Add either point values or evaluative words across the top row, adding or deleting columns as necessary. IN the grid, add descriptors of those behaviors which would be used to assign value to student’s work.

Objectives	1 point	2 points	3 points
use model kits to demonstrate dehydration synthesis of carbohydrates	Models are made correctly but not bonded correctly	Models are not bonded correctly but water has been removed	Models are bonded correctly AND water has been removed
Describe the process of dehydration synthesis	Definition only talks about water	Definition talks about bonding two building blocks together, but excludes the role of water	Definition correctly describes bonding two building blocks together AND correctly describes the role of water
apply dehydration synthesis to carbohydrates	Student knows the name of the building blocks of carbohydrates	Student knows the name of and the shape of the building blocks of carbohydrates	Student knows the name of and the shape of the building blocks of carbohydrates and can correctly draw a diagram of them bonding together
Judge the accuracy & completeness of electronic and/or graphical information & support those conclusions	Worksheet is partially completed	All questions on worksheet are answered but no explanations are given	Worksheet is completed in full

Evaluation of the Lesson – If students can complete the model activity with little input from me, I will consider it a success. For the objective “apply dehydration synthesis to carbohydrates”, students will have to demonstrate these skills on a test. Completing the computer lab worksheet correctly will show that students actually got something out of the activity. If it is filled in haphazardly, then I will know that the assignment did not achieve its goal. In high school science, we teach students the basics. I want the students to see that there is much more information available on any given topic.

Name _____________________________________ Biology

Using Websites to Learn More

Directions: Find 2 websites that give information on dehydration synthesis. Answer the questions based on each website. You will need to fill out two of these sheets.

1. What is the address of the website? _________________________________________

________________________________________________________________________

2. How do you know that is about dehydration synthesis? _________________________

________________________________________________________________________

3. What information is in it that we did not talk about in class? _____________________

________________________________________________________________________

4. What information did you find that you would like to learn more about and why?

________________________________________________________________________

5. Is there any information that contradicts the information we learned in class?

________________________________________________________________________

6. Do you think this website is reliable? Why or why not? ________________________

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