Chapter 10: Teaching Resources

Objectives:

1. Analyze computers and electronic technologies in science instruction

2. Discuss several computer based systems for teaching science by integrating multimedia and gathering data

3. Examine use of internet to support science instruction

4. Examine criteria for evaluating software resources

5. Discuss criteria for selection and use of textbooks

I. Modern Technology for Science InstructionA. Technology Infusion

1. Computers are cheap, trouble free, and powerful

2. Drill and practice use of computers is changing to their use as tools to access information, analyze information, and communicating

3. Technology called for by state, national, communitya. Internet access

b. CD drive

c. Some computers with data acquisition probes, projection displays

4. Strategy for technology infusion (Ball, 1996)a. Begin with vision, not machines

b. Use technology to do something different

c. Start locally and then go globally

B. Benefits of Technology Use (Collins, 1991)1. Shift from whole-class to small-group instruction

2. Shift from lecture and recitation to coaching

3. More engaged students

4. Assessment based on progress and effort rather than tests

5. Shift from verbal thinking to integrated visual/verbal thinking

II. Uses of technology in science instructionA. Finding out

1. Finding information is central to science

2. Reference software (CD-ROM’s) contain multimedia information

3. Simulation software used to find out about complex, dangerous, or expensive processesa. Radioactive processes

b. Astronomy simulations

c. Predator/Prey relationships

4. Internet contains vast amounts of information

B. Analyzing1. Data acquisition software and probes help students find out about

laboratory processesa. Authentic representation of what scientists do

b. Allow greater accuracy and ease of data manipulation

2. Simulation of labs: virtual frog dissection kit

C. Composing1. Students use word processing more than any other software

2. Writing about science helps clarify concepts

3. Concept mapping software

4. Multimedia software like PowerPoint to organize text, pictures, etc…

D. Communicating1. Ultimate science experience is communicating with others

2. Presentations to students, parents, etc…

3. Publishing to internet makes student work available to many

II. Computer-Based Instructional SystemsA. Computer Based Multimedia

1. Computer links other media forms: management and display

2. Interactive Videodisca. Individualized sequence of audio/video in response to student

b. Can also be used for flexible whole-class instruction

3. Compact Disca. Same function as videodisc with computer control

b. Cheaper and more widespread since CD drives have become standard

4. Hypermediaa. Computer-based format for linking information

b. Clickable links let user move from concept to concept

c. Matches model of how people learn

d. Hyperstudio lets student design their own hypermedia packages

5. Computer-Based Laboratoriesa. Unlike simulations, actual data is collected with computer help

b. Data can be displayed in real time

c. Hundreds or pre-packaged labs are available

d. Consist of software, an interface, and sensors to collect data (p. 207)

e. Greatly simplified graphing an spreadsheet calculation

f. Calculator-Based labs are beginning to do the same thing (cheaper)

g. Expense, number of computers are limitations

h. Benefits are improvement of attitude, interest in lab (Adams, 1990)

III. The Internet and Science TeachingA. Email

1. Students can share data, contact the teacher, ask question, etc…

2. Reduces time to interaction; don’t have to wait until next day

3. Partner classes from other schools (www.epals.com)

4. Listserves = computer based mailing list; you can read or posta. Science related listserves (p. 209)

b. Subscribing and unsubscribing usually fairly simple

c. www.lizst.com or tile.net/lists/ provide many lists to sign up with

5. Newsgroups = same functions as listserve except you must logon and there is no email clutter

B. World Wide Web1. Hypertext linking of vast amounts of text, pictures, videos, etc…

2. Search engines are numerous and useful in finding contenta. Often get thousands of hits which is frustrating to wade through

b. May be better to start on central, teacher identified sites

3. Central Science Sitesa. Federally funded projects often organize data on given topic

b. NASA (www.nasa.gov) on space and space exploration

c. Eisenhower site on Math and Science education (www.enc.org:80/)

d. Frank Potter’s Science Gems (www.exploratorium.edu/)

4. Internet Activities, Projects, and Inquiriesa. Students have difficulty judging site credibility and synthesizing data

b. Involve students with other net experiences before full inquiry

c. Internet Activities

i. Bookmark or Download selected site

ii. Develop questions and activities for students to do

d. Internet Projects

i. Collaborative student groups working on real world problems

ii. Students do real science while increasing internet skills

iii. University researchers, government labs have developed projects

e. Internet Inquiries

i. Students seek answers to their own questions

ii. Gather, analyze, interpret information form internet

iii. Students should communicate findings via web or otherwise

IV. Selecting Quality Software and MultimediaA. Considerations for software

1. Is it accurate and current

2. Is the language clear and concise

3. Will it enhance motivation and maintain interest

4. Is the learner an active participant

5. Is the software of high technical quality

6. Can the developer provide evidence of its effectiveness

7. Is the program free from bias

8. Are the teacher’s guides of high quality

9. Are clear directions provided for installation and use

10. Does the program stimulate creativity

B. Considerations for web resources1. Is the content referenced? Is an author identified?

2. Is the publication peer reviewed?

3. Does the publisher have a bias? Special interest group?

V. Evaluating Textbooks (Trowbridge, Bybee, and Powell, 2004)A. Use of textbooks in science education

1. Historical method of science instruction since 1820s

2. Contrary to Learning Cycle approach (definition before exploration)

3. Should be used in combination with other inquiry methods

4. Textbooks are not inherently bad; most good teachers use them

5. Textbooks help you make efficient curriculum choices, but they may not be the best curriculum choices

B. How students use textbooks1. Give up own conception, adopt that of the textbook

2. Distorting text to make it compatible with prior knowledge

3. Focus on facts and memorization without conceptual change

4. Focus on vocabulary and details without conceptual change

C. How teachers should use textbooks1. Direct students’ attention to important concepts (not vocabulary_

2. Challenge students’ thinking and misconceptions

3. Ask students to construct explanations of everyday phenomena

4. Probe student responses

5. Provide accurate feedback to students; don’t ignore wrong answers

6. Give alternative explanations to text that connect with student misconceptions

7. Select other, non-text activities that create conceptual conflict and encourage conceptual change

D. Selecting Textbooks1. Content and organization

a. Logical organization, sequence of difficulty, grouping of topics

b. Accuracy and recentness of information

c. Emphasis on concepts and principles

2. Development of non-content objectivesa. Development of interests and attitudes

b. Attention to problem-solving skills

c. Attention to science process skills

d. Attention to role of science and technology in society

3. Experiments, demonstrations, and activitiesa. Inquiry or verification approach

b. Student participation, activity, and investigation

c. Use of simple materials; degree of structure in labs

d. Emphasis on drawing conclusions from observations and experiments

4. Mechanical features of the textbooka. Binding, size, durability, attractiveness

b. Size of type, readability, summaries, glossary, index

c. Illustrations, charts, graphs, captions

d. General ease of use

5. Authorsa. Qualifications (experience, education)

b. Quality of writing, interest, and readability

c. Purpose of book and intended use

6. Useful life a. Copyright date, revisions, and reprintings

b. Nature of material, rate of obsolescence, years of usability

7. Rating the criteria0 = book totally lacking in the characteristic

1 = occasional evidence of the characteristic

2 = greater evidence of the characteristic, but still below average

3 = reasonably frequent evidence of the characteristic

4 = excellent evidence of the characteristic

5 = superior in all aspects of the characteristic

E. Readability1. Probably the most important characteristic of a text

2. Reading levels are quite variable in a given class

3. Select a text that will meet a variety of students’ needs

4. Select a text at or slightly below the grade level of class

5. Readability = sentence construction, sentence length, vocabulary, syllables, type of print, concept density

6. Several readability formulas exist, they won’t all agree

7. Fry’s Readability Graph is a simple method for classroom teachers