Thursday, December 6, 2007

My Revised Philosophy

Revised ICT Philosophy

It is often said that knowledge is a social construct which is built from our experiences and our social interactions. This is indeed true for this course (EDSC 6004), the integration of Information and Communication Technology (ICT) into Science Education. On entering this course, I was eager and excited to be enlightened on what was to be offered. I thought that our lecturer would teach us various ways of integrating ICT in our classrooms. This was achieved; however it was not the way I envisioned. Coming from a culture in which I was taught using a didactic approach or what we would now refer to as a traditional teaching method, I expected Mrs. Wood- Jackson (the lecturer) to follow this trend. Indeed this was only a fallacy in which my creativity and skills of designing five lessons using ICT was tested. My guiding philosophy has dwindled a bit but it has not changed, however my pedagogies and knowledge of students learning have. Autonomy was frightening; it was never so real as I initially stood midway between computer literacy and being illiterate. I took charge of my learning in this course and from assignment 1, never gave up even though “I felt at sea” with just enough energy to surface and gasp for a few tiny bit of air. Reading and re-reading articles and exploring the Internet became more than a daily hobby but rather a pain at times.

As I reflect on this course, I wish to advance some of the memorable learning experiences that have caused my philosophy to dwindle. To me, computer systems were just tools to help feeble minded persons accomplish their goals. This is indeed not the case since I have learnt that “cognitive tools” as is advanced by Jonassen (2003) involves higher order thinking skills which we should try to develop in our students. Instead of using considerable time in manually plotting graphs in inquiry based lessons, it is more beneficial for students to focus on the interpretation of the data and generate meaning from the empirical data. Students are allowed to develop factual, procedural, conceptual and meta-cognitive knowledge within the creative and critical domain. Jonassen (2007) expresses these sentiments excellently as he advocates that “learners function as designers, using the technology as tools for analyzing the world, accessing information, interpreting and organizing their personal knowledge and representing what they know to others”.

As I reflect on my first lesson plan on Word processing, I must admit that typing a document I believed was the simplest chore in the world. However, all the intricacies involved in the word processing is excellent, however an epiphany that I recall most clearly was the team “triangulation”. This involves the judging of the quality of scores and selecting “reliable and unreliable information”. Here students are indeed involved in comparing and contrasting data which require critical evaluation and higher order thinking skills. This was an immediate growth point for me that I had taken for granted.

My second lesson on spreadsheet involved the use of Microsoft excels to construct graphs. Spreadsheets, I soon learnt was an example of a cognitive technology that amplifies and reorganizes mental function. It supports problem solving activities, numeric thinking and are excellent visualization tools. In my teaching, even at the sixth form level, I often focused on the construction of graphs while their interpretations, even though they were important were sidelined. Working with spreadsheets, I soon realized helped to focus on the meaningful aspects of Chemistry.

Database proved to be a formidable task as I hammered away at it slowly, bit by bit until I was successful. Database as I understand are computerized record-keeping systems designed for the storage and retrieval of information because of its compactness, speed of entering information in the system, faster and easier access to information in the system and easier updating of the system. It is not as simplistic as I envisioned for I was faced with the task of executing queries. I soon learnt that it can be used to support comparison – contrast reasoning, which students engaged in while building databases, and in organizing information by identifying dimensions of the content. What is particularly interesting in database construction is that students must first decide on the appropriate content relationships. This is followed by searching for information in a systematic fashion to build their database. Database lessons I envisage is an important part of Chemistry and I see a clear connection since chemical analysis, data collection and the arrangement of this data plays a pivotal role in this discipline.

Among the many challenges of this ICT course, was the creation of a web quest to teach a scientific concept. This was the greatest challenge since I attempted it in isolation. I wanted no help from anyone and I was determined to succeed. After spending five long days on Dreamweaver, I finally gave into Microsoft front page which was also a huge challenge. Success finally knocked at my door and I actually used this lesson in my class. Impressed they (the students) were indeed by this type of learning which they embraced and successfully completed. This to me is a true example of autonomy and student centeredness.

One month ago, I gave my Upper six some projects assignments and they were asked to use multimedia to showcase their presentations. I worked long hours with them and the projects were presented to an audience of about 150 students and seven Science teachers. This was and will always be one of the most memorable occasions, as I showcased the capabilities of our students using ICT. I was very proud and overwhelmed at the presentation which took Chemistry into a new realm of Education. The Science Department was equally impressed and our Head of Department was very vocal as he expressed his support and encouragement for our genuine creativity and talent. Another group of students asked,” When are we getting a chance to do this?” The only solution I could afford was to achieve dialogue with their teacher.

ICT is a field that is changing so rapidly with new inventions and on an almost daily basis. It is moving so fast that it seems downright impossible to keep up with its speed of development. Three major concepts that I have never heard about in my life are copyright laws with respect to the internet; fair use guidelines and an acceptable use policy. At St. Mary’s College, I always believed that students simply observed the general rules of the school when using the computer facilities. I was right and my acceptable use policy was given the green light to be used at this institution. I feel so empowered and fortunate to have contributed to the ICT Department in this way, given the fact that I am a member of the Chemistry Department.

I have learnt so much from this course and feel so empowered to take what I have learnt back to my classroom and by extension to my department to improve Science teaching in my school. I see myself as indeed a leader in this department, in which I can make a difference and change. A few months ago I was an almost empty vessel and ICT was an almost abstract concept. One semester has lapsed and I have gathered a myriad of knowledge and skills. Special thanks to you Mrs. Aisha Wood- Jackson for your pleasant disposition and for sharing your expertise.

My Database Lesson Plan

Science Lesson Plan

Teacher: Arnold Mark Samai

Date: 1st November 2007

Class: Form 5

Time: 2 Hours

Unit: Qualitative Analysis

Topic: Tests for Cations

References

Chemistry; A Concise Revision Course For CXC by Ann Tindale, Chemistry for CXC – Lambert & Mohammed,

Pre Requisites

Knowledge: students should know - to construct databases and make queries

- to use Microsoft Word to type reports and draw tables

- to use Microsoft Excel to construct tables

Skill

Students should know how to – manipulate basic laboratory apparatus such as test tubes, droppers, reagent bottles

- cations can be present in solutions.

Materials and Resources

For Teacher

For each group student

Computer

15 test tubes and test tube rack

3 test tubes

Test tube holders

Aqueous NaOH

Dil. NaOH solution

Test tube holder

Dil. Aqueous NH3 solution

Test tube rack

With aqueous ammonia solubility varies. Examples include aluminium which precipitates and also forms a white precipitate which is in excess of ammonia solution.

In come reactions when gases are evolved particularly in the case of the presence of the ammonium ion. The evolution of the gas and further analysis can assist in the identification of the cation.

  1. Data Base Sheet
  2. Type with report
  3. Excel to draw table with answers

Basic Principle

Qualitative Analysis involves the identification of cations and anions in aqueous solution. In order to identify cations in solutions we rely on colour changes and their solubility in various reagents.

Objectives

At the end of the lesson students will be able to:

  • Explain the underlying principle used to identify cations in solution.

(Classification: Comprehension)

  • Perform experiments to identify cations in solution

(Classification: Psychomotor)

  • Deduce the cations that are present in known and in known solutions

(Classification: Application)

Process Skills

During this lesson, student will be engaged in:

  • Setting up and executing experimental work
  • Observing and measuring
  • Recording of data and observations
  • Interpreting and evaluating data and observations
  • Communicating scientific ideas, observations and arguments
  • Applying scientific ideas and methods to solve qualitative problems

Students are asked to observe the following procedure.

  • Teacher adds:
  1. Some KI to a solution containing lead nitrate (intensely yellow precipitate.)
  2. Some NaOH to a solution containing ammonium hydroxide and places the stopper of the HCl bottle at the top. (this gives intensely white fumes)
  3. Some aqueous Ammonia into a solution containing aluminium nitrate solution. (this gives a white precipitate.)

  • Teacher elicits response from the class regarding the observations of coulour changes, evolution of gases and formation of precipitates explaining that these are the basis for identifying cations in solution.

  • Teacher instructs students to use the twelve (12) solutions labeled to identify the colours, gases if any, and whether they form precipitates or not with NaOH (aq), aqueous Ammonia, excess NaOH and excess aqueous Ammonia. (see instruction sheet 1 for details).

  • Students then asked to construct a group database of the information gathered during the laboratory.

  • Teacher and Students engage in group discussion to share findings and clarify anomalies.

  • Students are then asked to test unknown substances A, B and C with the reagents provided (see table 2) and use their database to determine the cations present in each solution.

  • Teacher and students engage in group discussion of their findings as they justify their conclusion.

  • Teacher elicits response from four students in the class to summarize lesson.

Assessment

  1. Using examples explain the three factors that are taken into consideration when identifying cations in solution. Your answer is to be typed in Microsoft Word.
  2. Using your database fill out the observations and inferences in the table shown below.
  3. You are required to construct this table using either Microsoft Word or Excel and Print your answers.

Determination of Cations in Solution

Cations

Addition of NaOH drop wise

Addition of aqueous Ammonia

Addition of excess NaOH

Addition of excess Ammonia

Cr3+

Green (1)

Green (2)

Soluble (3)

Soluble (4)

Fe2+ (5)

Green precipitate

Green precipitate

Insoluble (6)

Insoluble (7)

Cu2+ (8)

Blue (9)

Blue (10)

Blue precipitate insoluble in excess

Blue precipitate insoluble in excess

Al3+, Pb2+, Zn2+ (11)

White precipitate

Mg2+ (12)

White precipitate

White (13)

White precipitate insoluble in excess

Insoluble (14)

Sample

Aqueous NaOH

Aqueous Ammonia

Excess NaOH

Excess Ammonia

A (Zn2+)

White precipitate

White

Soluble

Soluble

B (Cu2+)

Blue

Blue

Insoluble

Insoluble

B (Al3+)

White

White

Soluble

insoluble

There are three factors that are taken into consideration when analyzing cations in solution.

  • Colour
  • Solubility of precipitate used
  • Whether gases are evolved.

Cations form unique electrons in solution which assists in their identification. These include white (Al3+, Pb2+, Zn2+, Pb2+), blue (Cu2+), green (Fe2+), brown (Mn2+) and red-brown (Fe3+) just to name a few. The coloured compounds may or may not form precipitates whose solubility differs in aqueous sodium hydroxide and aqueous ammonia solution. Some precipitates dissolve in excess sodium hydroxide such as Zinc, while others form insoluble precipitates for example, Lead.

Continued on page 1.

Table1

Cations

Dropwise NaOH (aq) - Precipitate Evolved

Dropwise NH3 (aq) - Precipitate Evolved

Excess NaOH (aq)

Excess NH3 (aq)

Aluminium

White

White

Soluble

Insoluble

Ammonia

Gas Evolved

No Reaction

Soluble

No Reaction

Barium

Colourless

Colourless

Soluble

Soluble

Calcium

White

No Reaction

Insoluble

Soluble

Chromium

Green

Green

Soluble

Insoluble

Copper (II)

Blue

Blue

Soluble

Soluble

Iron (II)

Green

Green

Insoluble

Insoluble

Iron (III)

Red-Brown

Red-Brown

Insoluble

Insoluble

Lead (II)

White

White

Soluble

Insoluble

Magnesium (II)

White

White

Insoluble

Insoluble

Manganese (II)

Brown

Brown

Insoluble

Insoluble

Zinc (II)

White

White

Soluble

Soluble

My Web Quest Lesson Plan

Name: Arnold Mark Samai.

Date : 8th November 2007

Unit Title: Analytical Chemistry and Spectroscopy.

Form: Upper six.

Time : 2 hours.

Strategy: Inquiry based learning.

References:

CAPE chemistry by Mr. Arnold Mark Samai & Mrs. Susan Maraj (2007).

Internet sites to be provided in the web quest.

Prerequisites:

Knowledge: students should know

The origin of uv-vis spectroscopy

Resources to be used:

Computer, Textbooks.

Skills to be developed:

communicating, problem solving, decision making, drawing and evaluating conclusion

Materials and Resources:

For teacher and students

Computer with high speed internet access.

Concept Statement: Analytical Chemistry involve the analysis of samples in very dilute concentrations. UV Vis spectroscopy is one technique that can be used to analyze colored samples. The phosphate concentration of water can be determined using UV Vis spectroscopy.

Objectives.

At the end of the lesson, students will be able to: Classification

Explain the basic steps involved in analyzing samples by UV/VIS

spectroscopy. Application

Calculate the concentration of a given species using Beer-Lamberts law Analysis

Explain the procedure for analyzing a colorless substance by UV/VIS

spectroscopy Application

PROCESS SKILLS

During this lesson, student will be engaged in:

Designing and Planning an experimental procedure X

Recording data and observations X

Communicating scientific ideas, observations and arguments X

Applying scientific ideas and methods to solve qualitative and X

quantitative problems

Decision-making based on examination of evidence and arguments X

Activities : Set Induction

Introduction: Teacher begins class by recapping the scenario of the Maria Panday.

This case study sets analytical Chemistry within the context of a forensic investigation of a suspicious death.

On February 10th, 2007, Joy Manning found her friend Maria Panday dead in a river 100m from her home. After an initial search on the crime scene by the crime officers, the body was taken to the morgue. Door–to-door enquires revealed evidence of a boundary dispute between Maria Panday, David Dookeran and two of her children Uma Panday and Mikey Panday. Maria’s hair and clothing were completely wet, and the coroner estimated that she died within an hour of when the body was found. An autopsy revealed large quantities of water in her lungs, and the cause of death was listed as drowning.

In view of the circumstances, the police have labeled this death a homicide. Primary suspicion falls on David, Uma and Mikey. All of the adult children would inherit substantial fortunes from their mother, and all were known to have recently argued with her.

Knowing where the drowning took place will help the police to possibly narrow their list of suspects. There are only three bodies of water within a one-hour radius of where her corpse was found. They are the swimming pool at the local country club; a large stock pond on one son's ranch, and a mine-waste settling pond close to the river where she was discovered.

A chemical analysis of the water from Maria’s lungs reflected abnormally high concentrations of phosphates. It is hoped that analysis of water from the three possible drowning sites will pinpoint exactly where Maria drowned and thus provides a clue regarding his murderer.

Each group of students is investigating the suspicious death of Maria Panday. UV/VIS spectroscopy is one of the most powerful tools that can be used to analyze water samples. Your task is to explore the use of UV/VIS outlining how this case can be solved.

Development:

Teacher then asks students to work in pairs and use the web quest provided to channel a course

that can be taken to solve the death of Maria Panday.

Teacher allows groups to read the guidelines and ask questions as is customary with inquiry based learning.

The Essential Question:

The essential questions frame the research; they require Ss to make decisions and plan courses of action.

What exactly does the UV/ VIS spectrophotometer measure?

What plan can I develop to determine where Maria drowned?

Foundation questions

These are the questions. These provide a factual foundation from which the answers to the essential questions can be developed.

How did Maria Panday die?

What was present in her lungs?

Was the water in his lungs analyzed?

What were the analytes found in the water in his lungs?

Where did the phosphates in the water come from?

Was the water in the ponds analyzed?

How do we test the water in the pond?

What techniques can we use?

Were samples collected from the pond?

Did his body bore any marks of violence?

What were the contents of his will?

Developing a search Strategy

Here the students develop a search strategy for locating web information by closely examining the foundation questions for key words. Suitable searches can include:

(1) Analysis of phosphate content of the water

(2) Spectrophotometer

(3) Auxochrome – Colour development

(4) Procedure for analysis of phosphate in water

(5) Redox reactions

(6) Calibration curves

(7) Beer-lamberts Law

(8) Dilution of samples

CONSOLIDATION

1. Using a diagram explain the basic steps involved in the analysis of a sample using the UV/VIS Spectrophotometer.

2. What steps must be taken to analyze a colorless sample using UV/VIS spectroscopy.

3. Outline the procedure that must be taken to solve the case. You should write a 1000 word extended essay highlighting the procedure that should be followed.

My fairuse Guidelines for Teachers

Fair Use Guide For Teachers

“The congress shall have the power….To promote the progress of Science and useful Arts, by securing for limited times to authors and inventors the exclusive right to their respective writings and discoveries”. The U.S. Constitution (Article 1, Section 8, Clauses 1&8).

A copyright is a property right attached to an original work of art or literature. It grants the author exclusive right to reproduce, distribute, adapt, perform or display the protected work. Wrongful use of the materials gives the copyright owners the right to seek and recover compensation in a court of law. Copyright laws are now globally recognized and clauses have been incorporated in various constitutions worldwide to cater for authors and inventors who laid fertile ground for creative pursuits keeping in mind that rigid restrictions would stifle growth and learning. Copyright laws do not extend to facts since the underlying concepts of truth cannot be owned, however they include “literary, musical and dramatic work, pantomimed and choreographed work, pictorial, graphic and sculptured work, motion pictures and audiovisual works and sound recording and records which includes tapes, cassettes and computer disks” (Talab,1996,p.6).

Through the fair use provision, teachers have access to works far beyond classroom or textbooks and thereby may expand and enrich learning opportunities for students. Fair use is the most significant limitation on the copyright holder’s exclusive right. Although there are no rigid demarcation between what constitutes fair use and what does not, the following guide lines adapted from the U.S. Copyright Circular 21(1976) is helpful and should be followed.

Material

Allowances

Restrictions

Guide

Printed Material
(Short)

Poem less than 250 words

Excerpt of 250 words from a poem greater than 250 words

Articles, stories, or essays less than 2,500 words

Excerpt from a longer work (10% of work or 1,000 words, whichever is less—but a minimum of 500 words)

One chart, picture, diagram, graph, cartoon or picture per book or per periodical issue

Two pages (max) from an illustrated work less than 2,500 words (like children's books)

 Teachers may make multiple copies for classroom use and incorporate into multimedia for teaching classes.

 Students may incorporate text into multimedia projects.

 Copies may be made only from legally acquired originals.

 Only one copy allowed per student.

 Teachers may make copies in instances per class per term.

Printed Material
(archives)

An entire work

Portions of a work

 A work in which the existing format has become obsolete.

 A librarian may make up to three copies "solely for the purpose of replacement of a copy that is damaged, deteriorating, lost, or stolen."

 Copies must contain copyright information.

Archiving rights are designed to allow libraries to share with other libraries one-of-a-kind and out-of-print books

Illustrations and Photographs

Photograph

Illustration

Collections of photographs

Collections of illustrations

 Single works may be used in their entirety, but no more than five images by a single artist or photographer may be used.

 From a collection, not more than 15 images or 10 percent (whichever is less) may be used.

 Although older illustrations may be in the public domain and don't need permission to be used, sometimes they're part of a copyright collection.

Video
(for viewing)

Videotapes (purchased)

Videotape (rented)

DVD

Laser Discs

Teachers may use these materials in the classroom without restrictions of length, percentage, or multiple use

 Copies may be copied for archival purposes or to replace lost, damaged, or stolen copies.

 The material must legitimately acquired (a legal copy).

 Material must be used in a classroom or nonprofit environment "dedicated to face-to-face instruction".

 The use should be instructional, not for entertainment or reward.

 Copying OK only if replacements are unavailable at a fair price or in a viable format.

Video
(for integration into multimedia or video projects)

Videotapes

DVD

Laserdiscs

QuickTime Movies

Encyclopedias (CD ROM)

Students "may use portions of lawfully acquired copyrighted works in their academic multimedia", defined as 10% or three minutes (whichever is less) of "motion media"

 The material must be legitimately acquired (a legal copy, not bootleg or home recording).

 Proper referencing is required.

Music
(for integration into multimedia or video projects

Records

Cassette tapes

CDs

Audio clips on the Web

Up to 10% of a copyrighted musical composition may be reproduced, performed and displayed as part of a multimedia program produced by an educator or student for educational purposes.

 A maximum of 30 seconds per musical composition may be used.

 Multimedia program must have an educational purpose.

Computer Software

Software (purchased)

Software (licensed)

 Library may lend software to patrons.

 Software may be installed on multiple machines, and distributed to users via a network.

 Software may be installed at home and at school.

 Libraries may make copies for archival use or to replace lost, damaged, or stolen copies if software is unavailable at a fair price or in a viable format.

 Only one machine at a time may use the program.

 The number of simultaneous users must not exceed the number of licenses; and the number of machines being used must never exceed the number licensed. A network license may be required for multiple users.

 No copies are to be made except unless for archival purposes.

Internet

Internet connections

World Wide Web

 Images may be downloaded for student projects.

 Sound files may be downloaded for use in projects.

 Any resources you download must have been legitimately acquired by the Web site and properly referenced.

Television

Broadcast

Cable

Videotapes made of broadcast and cable TV programs

 Broadcasts or tapes made from broadcast may be used for instruction.

 Cable channel programs may be used with permission. Many programs may be retained by teachers for years.

 Schools are allowed to retain broadcast tapes for a minimum of 10 school days.

 Cable programs are technically not covered by the same guidelines as broadcast television.

References

http://home.earthlink.net/~cnew/research.htm. Retrieved 12th October 2007.

http://www.nccei.org/blackboard/copyright.html. Retrieved 12th October 2007.

Crews K. (2005).Fair-Use: Overview and Meaning for Higher Education. Indiana University.

www.umuc.edu/library/copy.shtml. Retrieved 18th October 2007.

www.techlearning.com/techlearning/pdf/events/techforum/tx05/TeacherCopyright_chart.pdf. Retrieved 18th October 2007.