Trends in Practical Work
The Nuffield Foundation spearheads the Practical Work for Learning
project, wherein practical work means “tasks in which students observe or
manipulate real objects or materials or they witness a teacher
demonstration”. Their website features teaching resources for physics,
chemistry, and biology, and are suitable for Key Stages 3-5. Research
summaries are also provided, for those
who want to delve further into the evidence underpinning the development of the
resources. You can explore more on the three approaches on practical work: (1)
Argumentation, (2) Model-based Inquiry, and (3) Science in the workplace,
through their website: http://www.nuffieldfoundation.org/practical-work-learning/about-project
On the other hand, the Science Community Representing Education
(SCORE), also based in the UK, found that practical work in science includes
the core activities and the directly related activities. The complementary
activities are important in supporting the development of conceptual
understanding in science through practical work.
Practical work in science Core activities
·
Investigations
·
Laboratory
procedures and techniques
·
Fieldwork
Directly related activities
·
Designing
and planning investigations
·
Data
analysis using ICT
·
Analysing
results
·
Teacher
demonstrations
·
Experiencing
phenomena
Complementary activities
·
Science-related
visits Surveys
·
Presentations
and role play
·
Simulations
including use of ICT Models and modeling
·
Group
discussion
·
Group
text-based activities
Millar (2009) cautioned us that not all practical work activities
may effectively accomplish our instructional objectives. Figure 1 shows that
the effectiveness of practical work lies in the alignment of the objective with
what students are intended and actually do during practical work. Basically,
there are two types of practical work according to Millar – practical work
carried out by the students and practical demonstrations carried out by the
teacher wherein students may help. The model shows that there are two
attributes to the effectiveness (1) coherence of intended and actual student
action, and (2) coherence of objective with learning outcomes.
Effectiveness is also influenced by several factors - the
developer’s views of
science (e.g. what s/he thinks is important to teach to the group of students
in question; his/her ideas about the nature of science and of the enquiry
process); the developer’s views of learning (e.g. what s/he thinks is
appropriate for learners of the age and stage for which the activity is
intended; how s/he thinks learning occurs); and the context in which the
activity will be used (e.g. the curriculum or course being followed; how
students are assessed; the resources available) (Millar, 2009).
Furthermore, practical works are done so that students can make sensible connections between tow domains (Figure 2): the domain of objects and observables (things we can see and handle) and the domain of ideas (which we cannot observe directly)
Table 1 sets this out in more detail. It
identifies the kind of evidence that would indicate that a practical activity
was effective in each of the senses identified above, in each of the two
domains.
According to Hattingh, Aldous and Rogan (2007),
the quality of practical work in science classroom depends primarily on the
teachers' perceptions of their learners. Also important, but to a lesser
extent, is the attitude of teachers towards innovation. A well functioning
school also appears to be an important factor. In their study, they classified
practical according to level of complexity as shown in Table 1 below. The classification was
also attributed to Rogan and Grayson (2002) by Merle Tan (n.d.).
Based on the findings of this research, when teachers perceive that
their learners are motivated and non-disruptive, then they are more likely to
engage learners in higher-level types of practical work. Common sense tells us
that if there is minimal deviant behavior and if the teacher has a very good
classroom management skill, then there will be more time for creativity rather
than resolving conflicts. Another important factor, although not as significant
as teacher perception, is the attitude of teachers towards innovation. If innovation
is generally supported in the school, science teachers engage in higher levels
of practical work. A well functioning school also appears to be an important
factor.
“If learners have the
strongest influence in motivating teachers to provide higher level types of
practical work, then creative ways can be sought to capitalise on this finding.
Our results suggest that the possibility of an upwards spiral exists. In our
experience, both as teachers and observers of classroom practice, we have
witnessed how excited learners often become when given the opportunity to do
interesting hands-on science. Motivated learners in turn motivate teachers, who
then provide more interesting kinds of practical work” (Hattingh, Aldous and Rogan, 2007).
A very surprising implication from this study is that doing of
practical work is not significantly dependent on whether teachers have physical
resources (e.g. laboratories, science apparatus or portable laboratory
stations). “It seems that those who are motivated to do practical work will
find ways to do so even in the most poorly resourced of schools. Conversely
those who are not motivated will not do practical work even when they have
access to the best of resources. At the moment there appears to be no link
between the provision of resources and the capacity of teachers”. This is contrary to the eternal
lament of local teachers about insufficient laboratory equipment, facilities
and supplies.
To be successful and effective, practical work has to:
ü
be interesting,
and even exciting
ü
have a
clear purpose, shared with pupils
ü
be well
planned
ü
timed
and managed to achieve its purpose
ü
be
manageable by pupils. (CLEAPSS, 2009).
Challenges and Issues
In a research commissioned in the UK, it was found out that
according to student respondents, the largest factor contributing to the lack
of lab skills was limited exposure to practical work at school. Teachers
provide very little practical work and relied heavily on demonstrations and/or
videos.
“Many students are telling us that they have done no practical
work at school so they struggle with basic skills like using a microscope, with
which they previously would have had some experience”
“Many of them claim to never have carried out an experiment only
watched teacher/videos of. Most of them have no idea how to act in a lab or
where to even begin when carrying out an experiment, ie no idea what equipment
is called.” (Gatsby, 2011).
In
Ghana, Yeboah (2012)concluded that learning of biology in the senior high
schools has of late not been very effective since the practical aspect of the
subject is neglected by many teachers He found out that revealed that teachers
who taught biology did not offer biology as area of specialization. Again
teachers lacked in-service training, workshops, refresher courses for teachers
of science, equipment and chemicals, lack of incentives, laboratory assistance,
professional teachers and lack of laboratories for practical work were the
various causes for the poor performance of biology students.
In a
comparative analysis of secondary high school syllabi in Slovenia, Šorgo and
Špernjak (2011) importance is given to practical work in the syllabi of
chemistry and physics, where it is recognized as a basic method, while in the
biology syllabus the construction of concepts is valued much higher. This issue
on practical biology work agrees with Yeboah’s findings. As a biology teacher,
myself, I humbly admit that a lion’s share of instructional time is spent on
discussion of concepts, processes, issues. I think biology teachers should
bring the students more to field observations and investigative work to break
the notion that Biology is difficult because of the memorization work. It has
also been a personal struggle to promote biology as an opportunity for a
lucrative career in the academe, research and industry because a lot of my
students think that those who major in Biology would either end up a doctor or
a teacher. Perhaps practical work would
uplift Biology’s popularity.
In a study conducted with Rachel Sharpe (2012) to English secondary
students, she found out that there is a general positive attitude towards
practical work. However, the extent of attitude towards practical work differed
not only across the three sciences , but also significantly as students
progressed through their secondary school education. The reason for this being
that the relative importance of the cognitive, affective and behavioural
domains changed as students moved away from a focus on the enjoyment of science
towards one that was examination orientated.
“By
understanding how students formulate their attitudes and what can impact on
their attitudes is integral to effectively enhancing their school science
experience. This study has shown that it is no longer realistic to discuss
students’ attitudes to science practical work per se since students hold
different attitudes to biology, chemistry and physics practical work and these
attitudes differ according to particular times in their academic life. Whilst
researching and finding out about students’ attitudes to practical work is
beneficial, it is what happens with that knowledge that will directly impact on
students and influence their attitudes.”
Sharpe’s conclusion may be high in ecological generalizability in
her context, but do we also observe the same trend among our high school
students. It would be interesting to find out if attitude of Filipino learners
towards practical work and the extent of their experience of PW have
significant implications to their choice of college course and career path,
which eventually impact the progress of science and engineering in our country.
In a position paper by the Society of Biology in the UK, released
in December 2010, they emphasized the nature of Biology as a practical science.
“Biology
is a practical science. High quality, appropriate biology experiments and
investigations are the key to enhanced learning, and clarification and
consolidation of theory. Practical activities are not just motivational and
fun: they also enable students to apply and extend their knowledge and
understanding of biology in novel investigative situations, which can stimulate
interest and aid learning and retention. Crucially, practical work gives
students an understanding of how biological knowledge is generated by experiment
and observation.”
Importance of practical work in science
Practical work is a key factor in engaging, enthusing and inspiring
students, thus stimulating lifelong interest in science. High quality,
appropriate practical work is central to effective learning in science.
The Society of Biology believes that it is important to support and
promote practical work in science because it:
· Stimulates creativity, curiosity and critical
thinking
· Underpins and illustrates concepts, knowledge
and principles
· Promotes student engagement with the scientific
method
· Encourages active learning and problem-solving
· Allows collaborative working
· Provides opportunities to collect and analyse
data and apply mathematical skills
The Society of Biology believes that it is important to support and
promote high quality practical work in biology because it:
· Illustrates the beauty and complexity of the
living world
· Promotes understanding of how to extract
information from complex living systems
· Provides experience of analysing and evaluating
variable data
· Highlights and promotes discussion of ethical
issues
· Gives students the skills to tackle global
challenges
Practical Biology Resources
To support the delivery of high quality practical work at all
levels, the Society of Biology recommends the following resources and websites:
· Practical Biology Website:
www.practicalbiology.org
· Getting Practical - Improving Practical Work in
Science: www.gettingpractical.org.uk
· The Language of Measurement, ASE and Nuffield
Foundation 2010 (ISBN: 978 0 86357
424 5)
· Analysing Practical Science Activities to
Assess and Improve Their Effectiveness, ASE 2010 (9 78 086357 425 2)
· Biological Nomenclature 4th Edition, Institute
of Biology, 2009 (978 0 900490 39 2)
Beyond Science Literacy: A Conclusion
“Our
world is profoundly shaped by science and technology. Preserving the
environment, reducing poverty and improving health: each of these challenges
and many more require scientists capable of developing effective and feasible
responses – and citizens who can engage in active debate on them.”
- UNESCO
Macedo (2006) identified the four
pillars for learning: (1) learning to live together; (2) learning to be; (3)
learning to do; and (4) learning to know. UNESCO declares that these four
pillars help us decide what we should include in scientific literacy for all. Through
these four pillars, students should have opportunities to develop their
imagination and creativity, as they become active learners. In the longer term,
such developments will support the students to lead more fruitful lives
individually and as members of future societies.
Implications to practical work:
“ Learning to live together.
School science necessarily implies practical work of different sorts. For a
number of reasons, both for managing the class and for good pedagogical
reasons, students work in groups to carry out science investigations.
Learning to do.
Through science learning, students will learn to define, refine and resolve
problems and ideas. They will learn to do this through practical data
gathering, collecting information from a range of sources, transforming that
data to make broader generalizations, explaining their outcomes and justifying
their positions.”
Needless to say, the key to quality practical work and their
effective implementation in science is the teacher. The Society of Biology
strongly advocates teacher training responsive to advancement of practical work
as a staple teaching strategy. Nieda and Macedo (1997) offer a succinct summary
of the outcomes of research on classroom climate and teacher-student relations.
Two of five conclusive statements stipulated in the UNESCO document further
signify the relevance of practical work.
· Teachers have high expectations for all the
students in their class and are able to convey these expectations to their
students.
· The more the students are involved in their
tasks the more the outcomes increase, provided that the tasks are within the
reach of students and of their peers working together.
In conclusion, practical work is indeed a significant determiner of
interest and attitude toward science. It is an effective tool for developing
scientific culture, critical and creative thinking. Practical work can only be
utilized if teachers are properly trained and if academic supervision and
educational administration are supportive of innovations and are adept in
empowering teachers despite insufficient, if not lack, of updated and
sophisticated technology.
The cartoon below depicts a teacher who has all the reasons in the
world why he cannot engage in practical work. Do we or do we not identify with
him? I hope I’m not and never will be!
Hattingh,
Annemarie, Aldous, Colleen and Rogan, John (2007). Some factors influencing the
quality of practical work in science classrooms. African Journal of Research in
SMT Education, Volume 11(1) 2007, pp. 75-90.
Science Community Representing Education (SCORE). (n.d.) Practical
work in science:
Sharpe,
Rachel May (2012). Secondary school students’ attitudes to practical work in
school science. Unpublished doctoral dissertation, University of York Education.
Society of Biology (2010). Practical Biology Position Statement: The
Importance of Practical Biology: from School to Higher Education. Retrieved
Oct. 1, 2014 from www.societyofbiology.org.
Šorgo, Andrej and Špernjak, Andreja. (2011). Practical Work in Biology, Chemistry and
Physics at Lower Secondary and General Upper Secondary Schools in Slovenia. Eurasia Journal of Mathematics, Science
& Technology Education, 2012, 8(1), 11-19.
UNESCO (n.d.). Current challenges in basic science education.
Paris, France: UNESCO
Retrieved
Yeboah,
E. (2012). A survey of biology practical work in selected senior high schools
in the eastern region of ghana. University of Education, Winneba
Institutional Repository, Nov. 12, 2012. Retrieved Oct.1, 2014 from http://ir.uew.edu.gh:8080/jspui/handle/123456789/184