Experience sharing

K C Pun ([email protected])

M K So ([email protected])

Experience sharing

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LABORATORY

Teacher Laboratory Technician

STUDENTS

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Agenda todayDuty of Laboratory Technician

Teacher’s perspective and LT’s perspective

Challenges and how to overcome

Coordination among Science Teachers, LT, and Laboratory Attendant

Implementing NSS

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Duty of Laboratory Technician: Focus areas

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Lab maintenance and regular inspection

Procurement of chemicals

Storage of chemicals and equipment

Daily preparation for students' practical

Duty of Laboratory TechnicianRegular operations

Ordering of chemicals / apparatusCategorization of chemicals / apparatus

Daily operationsBefore laboratory sessionDuring laboratory sessionAfter laboratory session

Annual operationsStock checkWriting off items

Other duties assigned by the school

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Duty of laboratory technician: Regular operations

Any budget [Incorporated into school and class grant]

Take note that some chemicals would require licenseExample: KMnO4

Who?

How?

Ordering of chemicals / apparatus

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Procurement of chemicals / apparatusUsual practice in EDB

Any requirement in the schoolPurchasing substances without receipt? How and How much?

=> Tendering procedure and purchasing practice

EDB:EDBC No. 15/2007


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EDB Suggestions: EDBC No. 15/2007Financial limits Procurement

arrangements$5,000 or below Competitive bidding not required if

certified by a staff member at an appropriate rank that such purchases are essential and their prices are fair and reasonable

Above $5,000 but below $30,000 By oral quotation (at least two)

From $30,000 to $50,000 By written quotation (at least two)

Above $50,000 By tenders (at least five)


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School requirementsAny further school requirementsHow about those without official receipts?Visa to purchase:

Allowed?

Who?

How much?

Any reason?

Our school: Quotation form

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Never over budget

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Petty cash

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First-aid box; washing-eye bottle

Fire extinguishers / fire blanket / sand bucket

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Hazard warning labelsIn case of doubt, consult MSDS


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Categorization / storage of chemical reagents / apparatusAny special reagents / radioactive substancesRefer to booklets issued by EDBStorage of Chemicals in Laboratories

http://chemistry.umeche.maine.edu/Safety/Storage.html (accessed on 9/11/2012)

A good categorization systemStock roomPreparation room

Preparation room

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Storage of chemicals

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Collection of chemical wastes

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Storage of chemical wastes

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Laboratory: Easy access to some apparatuses for students

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Laboratory: Storage of safety goggles

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Duty of laboratory technician: Daily operations

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Before laboratory sessionHave all the chemical reagents / apparatus ready

Personal safety

Preparing solutions

Bromine water: may not require to purchase

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NaBr 1.10 g

HCl 1 M 10.7 mL

Sodium hypochlorite (bleaching solution 7.6 mL

Water 32 mL

Dissolve NaBr in HCl and transfer with water to the labeled bottle.

Add sodium hypochlorite to the bottle and swirl to mix the reagent.


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Checking of laboratory – all in good order

Some questions to be answered (with the help of teacher):How many groups?

Arrangement: In plastic trays

Weighing substances by students

Senior forms – any special cabinet (any form for students to sign)

(May have differences in different laboratories

Physics: rotation

Chemistry / Biology: all do the same experiment

Bench reagents

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Duty of laboratory technician: Daily operations: Before Lab session

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May have to work out the experimental results for the teacher

Data

Any foreseeable dangers in the experiments?Discuss with the science teachersMSDS

Any new science teachers?May be unaware of the safety practice


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Within the laboratory sessionMay have to walk aroundSmooth run of the laboratory sessionStudents may have diverse ability in handling of apparatusUsing air conditioners

Suggestion: Bunsen flame => turn off air conditioner

Usually encountersBasic first aid treatment

First Aid course?

Duty of laboratory technician: Daily operation: Within laboratory session

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Any danger / bad practice should be stopped immediatelyClosed system

Washing bottles

Safety goggles

Use of burette clamp

Chemical reagents

Spillage (e.g. acids / alkalis) and chemicals removed by students (e.g. magnesium)

Broken glass apparatus

Within the laboratory session:Students should be aware of

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Use an appropriate amount

Solubility: sample-water mixture should be well shaken

Strong heating of a substance: take some time for thedecomposition

NaOH(aq) / NH3(aq): have to add excess

Avoid overheating of solutions (especially concentratedacids) leading their spillage.


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After laboratory sessionMay have to clean the laboratory immediately for the next classRequire the help of laboratory attendant

Use of gloves

They may lack knowledge of chemical reagents or handling of apparatus

A suggestion:May consider: time-tabling to schedule laboratory (Very challenging)

Duty of laboratory technician: After the laboratory session

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Handling / Storage of chemical wastesCompatibility of chemical wastesIn special cabinet

In designated bottles

Categorization of chemical wastesAcidAlkaliOrganic

Arrangement for the collection of chemical wastesE.g. Saturday

Duty of laboratory technician: Annual

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Check stock of chemicals

Writing off items

Number of grams of KMnO4 used

Safety cabinet

Duty of laboratory technician: Other duties to be assigned by school

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May have other duties:In this school

Extracurricular activities related to Science (LSS)

Camera man

AV Aids

CYC Club

Chinese Calligraphy

Etc.

Negotiate with the school: no other duties during laboratory sessions

If possible, also the laboratory attendant




Coordination among science teachers, LT, and Laboratory attendant

Implementing NSS

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Note that:

Nothing is difficultbut only challenging

Challenges

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PersonalDuty

With peopleScience teachersLaboratory attendantStudentsNon-science teachers

Reagents / apparatusNon-availabilityEquipment failure

Challenges: Personal

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I have a lot of duties to perform in schoolNegotiate with the person-in-charge

Talk with the panel chairpersons

Within laboratory session: in laboratory

Prioritizing the duties

Challenges: with people

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Most challenging: Dealing with people

Laboratory Technician


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Science teachersEarly in the day, I have to do an experiment.

What should be your reaction?


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Laboratory attendantDaily cleaning of the roomS/he may be naïve on the nature of wastes. What advice will you give him / her?


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StudentsYou are not my teacher. I am not required to listen to your instructions.

What is your reaction?


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Non-science teachersThe non-science teachers may use the laboratory.[May occur quite frequently owing to LS splitting of groups]

What should you do?

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The most challenging problem faced would be to find a wayin having an effective and efficient collaboration among (science) teachers, LT, and Laboratory attendant





Implementing for NSS

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Coordination among science teachers, LT and Laboratory attendant

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CommunicationExpressing your own concernsConsider other concernsConsider the limitations in the environment

We are inter-dependent


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Highlights the importance of laboratory technician in laboratory regulations

Any accidents occurring in the laboratory should be reported immediately to the teacher and laboratory technician.

Showing respect to each other

Collaboration requires effective communication


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Microscale => more safe?

May neglect the safety aspects





Implementing NSS

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Implementing NSS

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Implementing NSS: Basics

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Compulsory part + Elective part

Which electives are chosen?Biology [Two from Human Physiology; Applied Ecology; Microorganisms and humans; Biotechnology]Chemistry [Two from Analytical Chemistry; Materials Chemistry; Industrial Chemistry]Physics [Two from Astronomy and Space Science; Atomic World; Energy and Use of Energy; Medical Physics]

Checking of apparatus

Implementing NSS: Budget

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Any budget allocated from the school?

At present, in School and Class GrantWhat is your school practice?

Note that there is migration grantSchool authority can use this lump sum of money to purchase items for transition to NSS

Implementing NSS

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Any new items to be purchased (Generally no if your school has offered AL at present)

Any course to attend:YesPreparing Laboratory technicians for NSS

Any new arrangement for NSS science subjects:

Investigative study (optional)

Implementing NSS: Any new items?

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Physics

If elective “Astronomy & Space Science” chosenMay require to purchase telescopeMay require quotation

If elective “Atomic World” chosen, any equipment for spectrum?

Chemistry to Physics

Implementing NSS – Any new items?

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ChemistryBCA

Enough glassware: e.g. burette / pipette / volumetric flaskConsider to have surplus

Miscroscale apparatus

Organic ChemistryMicroscale

Fume cupboard

Implementing NSS

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Number of fume-cupboards

At least 2 years

Implementing NSS

61 http://www.hkeaa.edu.hk 1/11/2010

Implementing NSS (IS)

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Year of implementation:

IS to be included: Optional

More about IS (Physics p.87 / Chemistry p.83)

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Searching for and defining questions for investigation

Developing an investigation plan

Conducting the investigation

Organising and analysing data for a justified conclusion

Presenting findings in written reports, posters and by other means

More about IS (Physics p.87 / Chemistry p.83)

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Searching for and defining questions for investigation

Developing an investigation plan LT

Conducting the investigation LT

Organising and analysing data for a justified conclusion

Presenting findings in written reports, posters and by other means

More about IS in science subjects

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Group work

Same or different?

When?

Where?

What additional items to be purchased?

Are the students required to purchase their own things?

MSDS

Final RemarksResources in HKEdCity

Biologyhttp://edblog.hkedcity.net/nssbio

Chemistryhttp://edblog.hkedcity.net/nsschem

Physicshttp://edblog.hkedcity.net/nssphysics

Sciencehttp://edblog.hkedcity.net/stc/

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Final RemarksOther subjects may use laboratory

GeographyHealth Management & Social CareTechnology and LivingLS (IES)

Each school may have its own situation

Combined Science – Any arrangement?

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Final remarks

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NSS has been implemented : so far so good!What do you think?

The future is bright and beautiful.

Final remarks

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Effective collaboration among various groups depend highly on communication

Teachers need your help.

Final remarks

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Nothing is difficult but only challenging.

Experience sharing

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