bbst026

8/18/2006

Final Assignment 2

Most S.4 Chemistry Students do not know why the end point of an acid-base titration (e.g. colour change of the indicator) can roughly match the equivalence point of the titration. From the following learning object, it shows when various amount of hydrochloric acid (acid) is added into sodium hydroxide solution (base), the pH of the reaction mixture (indicated by the titration curve) and colour of the indicator (in this case : methyl orange) at each particular moment. The visual representation can make the case explicitly visualize to the students.

How to use it

When adding different volumes of hydrochloric acid (HCl) into sodium hydroxide solution (NaOH) by dragging slider from left to right, the pH value of the reaction mixture can be shown on the titration curve and the colour of the indicator (methyl orange) can be shown simultaneously on the conical flask.

The presentation can show that the end point of the titration (the indicator changes its colour from yellow to red) is very close to the equivalence point of the titration (10 mL). It makes students clear why the end point of the titration can be used to replace the equivalence point of the titration in volumetric analysis calculation.

My presentation Flash file is placed on http://iln.cite.hku.hk/com/1238/users/wmlam/Titration2.fla


7/21/2006

My proposed final assignment 2

Most S.4 Chemistry Students do not know why the end point of an acid-base titration (e.g. colour change of the indicator) can roughly match the equivalence point of the titration. From the following learning object, it shows when various amount of hydrochloric acid (acid) is added into sodium hydroxide solution (base), the pH of the reaction mixture (indicated by the titration curve) and colour of the indicator (in this case : methyl orange) at each particular moment. The visual representation can make the case explicitly visualize to the students.

How to use it

When adding different volumes of hydrochloric acid (HCl) into sodium hydroxide solution (NaOH) by dragging slider from left to right, the pH value of the reaction mixture can be shown on the titration curve and the colour of the indicator (methyl orange) can be shown simultaneously on the conical flask.

The presentation can show that the end point of the titration (the indicator changes its colour from yellow to red) is very close to the equivalence point of the titration (10 mL). It makes students clear why the end point of the titration can be used to replace the equivalence point of the titration in volumetric analysis calculation.

My presentation Flash file is placed on http://iln.cite.hku.hk/com/1238/users/wmlam/Titration2.fla


7/07/2006

Storyboard of my final assignment

7/06/2006

Reflection on Session 6

In the session, we have learnt the planning process of interactive visual project.

In order to produce a storyboard for my proposed final assignment, some relevant information should be collected and the content of it should be studied precisely and carefully. Also, we have learn how to make Flash buttons and control an object on the scene. I think it will kill me some time to handle it well and apply the skills into my project.

6/29/2006

My proposed final assignment

Being a chemistry teacher, I want to prepare an interactive visual representation on changes on pH values and colour of indicator in acid-base titrations. Titration is the most important step on quantitative analysis in Chemistry, many S.4 students cannot tackle it very well and do not fully understand the relationship between the changes on colour of indicator and pH values. Through the presentation, I hope students can get deeper understanding on titrations.

Reflection on Session 5

In the session, we have learnt that when preparing an interactive representation, data collection is very important. There are many resources of data or information in the Internet, we should make a proper selection among them. Otherwise, learners may misunderstand the concept or information of the topic.
Multimedia for learning should be designed according to human thinking. Visual and text can take advantage of the full capacity of human for procession of information. That means they can complement each other. Multimedia representations act as cognitive aids to shift learning as information acquisition into knowledge construction.

6/23/2006

Shape of a rain drop

Please Click the Powerpoint presentation below:


Reflection on Session 4

In the session, we have discussed the topics on Interactive visualization and learning objects. On my teaching, many complex ideas or information are very difficult to present through traditional methods. Many students cannot get the points of some concepts. Through interactive visualization, we can present a lot of information in a small screen space, communicate complex ideas with simpler, creative, efficient and effective visual ways. I hope I can design my own interactive visualization tools to facilitate my teaching. There are six types of learning objects: presentation, practice, simulation, conceptual models, information and contextual representation. They are designed to afford uses in different education contexts. I got some insights through the demonstrated learning objects. Some important but complex concepts can be represented in simpler and interactive ways.

6/15/2006

Reflection on Session 3

Being a school teacher, I pay attention to the importance of Copyright and avoiding Plagiarism. Inside the classroom, I always claim that we cannot reproduce other works directly. We should respect others and learn to produce our own high standard works.
In our knowledge world, many free graphics can be obtained from the Internet. Also, we participate on this module in order to grasp the technical skill to produce our own interactive and innovative artifacts.
We have learnt how to use the software Photo story and Windows Movie Maker to produce our digital story in the session. It is very impressive and creative. I attempted to use some family photos to produce digital story movie. My family is very pleased to it. In school, it can motivate my students on some new topics. It can also produce an overview of the whole section.

Digital story

My Digital Story of the introduction of ECA