History of Educational Technology

There is no written evidence which can tell us exactly who has coined the phrase educational technology. Different educationists, scientists and philosophers at different time intervals have put forwarded different definitions of Educational Technology. Educational technology is a multifaceted and integrated process involving people, procedure, ideas, devices, and organization, where technology from different fields of science is borrowed as per the need and requirement of education for implementing, evaluating, and managing solutions to those problems involved in all aspects of human learning.

Educational technology, broadly speaking, has passed through five stages.

The first stage of educational technology is coupled with the use of aids like charts, maps, symbols, models, specimens and concrete materials. The term educational technology was used as synonyms to audio-visual aids.

The second stage of educational technology is associated with the ‘electronic revolution’ with the introduction and establishment of sophisticated hardware and software. Use of various audio-visual aids like projector, magic lanterns, tape-recorder, radio and television brought a revolutionary change in the educational scenario. Accordingly, educational technology concept was taken in terms of these sophisticated instruments and equipments for effective presentation of instructional materials.

The third stage of educational technology is linked with the development of mass media which in turn led to ‘communication revolution’ for instructional purposes. Computer-assisted Instruction (CAI) used for education since 1950s also became popular during this era.

The fourth stage of educational technology is discernible by the individualized process of instruction. The invention of programmed learning and programmed instruction provided a new dimension to educational technology. A system of self-learning based on self-instructional materials and teaching machines emerged.

The latest concept of educational technology is influenced by the concept of system engineering or system approach which focuses on language laboratories, teaching machines, programmed instruction, multimedia technologies and the use of the computer in instruction. According to it, educational technology is a systematic way of designing, carrying out and evaluating the total process of teaching and learning in terms of specific objectives based on research.

Educational technology during the Stone Age, the Bronze Age, and the Iron Age

Educational technology, despite the uncertainty of the origin of the term, can be traced back to the time of the three-age system periodization of human prehistory; namely the Stone Age, the Bronze Age, and the Iron Age.

Duringthe Stone Age, ignition of fire by rubbing stones, manufacture of various handmade weapon and utensils from stones and clothing practice were some of the simple technological developments of utmost importance. A fraction of Stone Age people developed ocean-worthy outrigger canoe ship technology to migrate from one place to another across the Ocean, by which they developed their first informal education of knowledge of the ocean currents, weather conditions, sailing practice, astronavigation, and star maps. During the later Stone Age period (Neolithic period),for agricultural practice, polished stone tools were made from a variety of hard rocks largely by digging underground tunnels, which can be considered as the first steps in mining technology. The polished axes were so effective that even after appearance of bronze and iron; people used it for clearing forest and the establishment of crop farming.

Although Stone Age cultures left no written records, but archaeological evidences proved their shift from nomadic life to agricultural settlement. Ancient tools conserved in different museums, cave paintings like Altamira Cave in Spain, and other prehistoric art, such as the Venus of Willendorf, Mother Goddess from Laussel, France etc. are some of the evidences in favour of their cultures.

Neolithic Revolution of Stone Age resulted into the appearance of Bronze Age with development of agriculture, animal domestication, and the adoption of permanent settlements. For these practices Bronze Age people further developed metal smelting, with copper and later bronze, an alloy of tin and copper, being the materials of their choice.

The Iron Age people replaced bronze and developed the knowledge of iron smelting technology to lower the cost of living since iron utensils were stronger and cheaper than bronze equivalents. In many Eurasian cultures, the Iron Age was the last period before the development of written scripts.

Educational technology during the period of Ancient civilizations

According to Paul Saettler, 2004, Educational technology can be traced back to the time when tribal priests systematized bodies of knowledge and ancient cultures invented pictographs or sign writing to record and transmit information. In every stage of human civilization, one can find an instructional technique or set of procedures intended to implement a particular culture which were also supported by number of investigations and evidences. The more advanced the culture, the more complex became the technology of instruction designed to reflect particular ways of individual and social behaviour intended to run an educated society. Over centuries, each significant shift in educational values, goals or objectives led to diverse technologies of instruction.

The greatest advances in technology and engineering came with the rise of the ancient civilizations. These advances stimulated and educated other societies in the world to adopt new ways of living and governance.

The Indus Valley Civilization was an early Bronze Age civilization which was located in the northwestern region of the Indian Subcontinent. The civilization was primarily flourished around the Indus River basin of the Indus and the Punjab region, extending upto the Ghaggar-Hakra River valley and the Ganges-Yamuna Doab, (most of the part is under today’s Pakistan and the western states of modern-day India as well as some part of the civilization extending upto southeastern Afghanistan, and the easternmost part of Balochistan, Iran).

There is a long term controversy to be sure about the language that the Harappan people spoke. It is assumed that their writing was at least seems to be or a pictographic script. The script appears to have had about 400 basic signs, with lots of variations. People write their script with the direction generally from right to left. Most of the writing was found on seals and sealings which were probably used in trade and official & administrative work.

Harappan people had the knowledge of the measuring tools of length, mass, and time. They were the first in the world to develop a system of uniform weights and measures.

In a study carried out by P. N. Rao et al. in 2009, published in Science, computer scientists found that the Indus script’s pattern is closer to that of spoken words, which supported the proposed hypothesis that it codes for an as-yet-unknown language.

According to the Chinese Civilization, some of the major techno-offerings from China include paper, early seismological detectors, toilet paper, matches, iron plough, the multi-tube seed drill, the suspension bridge, the wheelbarrow, the parachute, natural gas as fuel, the magnetic compass, the raised-relief map, the blast furnace, the propeller, the crossbow, the South Pointing Chariot, and gun powder. With the invent of paper they have given their first step towards developments of educational technology by further culturing different handmade products of paper as means of visual aids.

Ancient Egyptian language was at one point one of the longest surviving and used languages in the world. Their script was made up of pictures of the real things like birds, animals, different tools, etc. These pictures are popularly called hieroglyph. Their language was made up of above 500 hieroglyphs which are known as hieroglyphics. On the stone monuments or tombs which were discovered and rescued latter on provides the evidence of existence of many forms of artistic hieroglyphics in ancient Egypt.

Educational technology during Medieval and Modern Period

Paper and the pulp papermaking process which was developed in China during the early 2nd century AD, was carried to the Middle East and was spread to Mediterranean by the Muslim conquests. Evidences support that a paper mill was also established in Sicily in the 12th century. The discovery of spinning wheel increased the productivity of thread making process to a great extent and when Lynn White added the spinning wheel with increasing supply of rags, this led to the production of cheap paper, which was a prime factor in the development of printing technology.

The invention of the printing press was taken place in approximately 1450 AD, by Johannes Gutenburg, a German inventor. The invention of printing press was a prime developmental factor in the history of educational technology to convey the instruction as per the need of the complex and advanced-technology cultured society.

In the pre-industrial phases, while industry was simply the handwork at artisan level, the instructional processes were relied heavily upon simple things like the slate, the horn book, the blackboard, and chalk. It was limited to a single text book with a few illustrations. Educational technology was considered synonymous to simple aids like charts and pictures.

The year 1873 may be considered a landmark in the early history of technology of education or audio-visual education. An exhibition was held in Vienna at international level in which an American school won the admiration of the educators for the exhibition of maps, charts, textbooks and other equipments.

Maria Montessori (1870-1952), internationally renowned child educator and the originator of Montessori Method exerted a dynamic impact on educational technology through her development of graded materials designed to provide for the proper sequencing of subject matter for each individual learner. Modern educational technology suggests many extension of Montessori’s idea of prepared child centered environment.

In1833, Charles Babbage’s design of a general purpose computing device laid the foundation of the modern computer and in 1943, the first computing machine as per hi design was constructed by International Business Machines Corporation in USA. The Computer Assisted instruction (CAI) in which the computer functions essentially as a tutor as well as the Talking Type writer was developed by O.K. Moore in 1966. Since 1974, computers are interestingly used in education in schools, colleges and universities.

In the beginning of the 19th century, there were noteworthy changes in the field of education. British Broadcasting Corporation (BBC), right from its start of school broadcasts in 1920 had maintained rapid pace in making sound contribution to formal education. In the USA, by 1952, 20 states had the provision for educational broadcasting. Parallel to this time about 98% of the schools in United Kingdom were equipped with radios and there were regular daily programmes.

Sidney L. Pressey, a psychologist of Ohio state university developed a self-teaching machine called ‘Drum Tutor’ in 1920. Professor Skinner, however, in his famous article ‘Science of Learning and art of Teaching’ published in 1945 pleaded for the application of the knowledge derived from behavioral psychology to classroom procedures and suggested automated teaching devices as means of doing so.

Although the first practical use of Regular television broadcasts was in Germany in 1929 and in 1936 the Olympic Games in Berlin were broadcasted through television stations in Berlin, Open circuit television began to be used primarily for broadcasting programmes for entertainment in 1950. Since 1960, television is used for educational purposes.

In 1950, Brynmor, in England, used educational technological steps for the first time. It is to be cared that in 1960, as a result of industrial revolution in America and Russia, other countries also started progressing in the filed of educational technology. In this way, the beginning of educational technology took place in 1960 from America and Russia and now it has reached England, Europe and India.

During the time of around 1950s, new technocracy was turning it attraction to educations when there was a steep shortage of teachers in America and therefore an urgent need of educational technology was felt. Dr. Alvin C. Eurich and a little later his associate, Dr. Alexander J. Stoddard introduced mass production technology in America.

Team teaching had its origin in America in the mid of 1950′s and was first started in the year 1955 at Harvard University as a part of internship plan.

In the year 1956, Benjamin Bloom from USA introduced the taxonomy of educational objectives through his publication, “The Taxonomy of Educational Objectives, The Classification of Educational Goals, Handbook I: Cognitive Domain”.

In 1961, Micro teaching technique was first adopted by Dwight W. Allen and his co-workers at Stanford University in USA.

Electronics is the main technology being developed in the beginning of 21st century. Broadband Internet access became popular and occupied almost all the important offices and educational places and even in common places in developed countries with the advantage of connecting home computers with music libraries and mobile phones.

Today’s classroom is more likely to be a technology lab, a room with rows of students using internet connected or Wi-Fi enabled laptops, palmtops, notepad, or perhaps students are attending a video conferencing or virtual classroom or may have been listening to a podcast or taking in a video lecture. Rapid technological changes in the field of educational have created new ways to teach and to learn. Technological changes also motivated the teachers to access a variety of information on a global scale via the Internet, to enhance their lessons as well as to make them competent professional in their area of concern. At the same time, students can utilize vast resources of the Internet to enrich their learning experience to cope up with changing trend of the society. Now a days students as well teachers are attending seminars, conferences, workshops at national and international level by using the multimedia techno-resources like PowerPoint and even they pursue a variety of important courses of their choice in distance mode via online learning ways. Online learning facility has opened infinite number of doors of opportunities for today’s learner to make their life happier than ever before.

Jewelry Making Or Perfume Making – What’s the Difference?

Very recently I've stumbled upon what proves to be another new hobby of mine, making perfumes using natural, essential oils. I've purchased several oils from the UK so far, and started combining them to make perfumes. Which does not seem to be so easy as I first thought. Most of the concoctions smell horrible, at best as a bad medicine.

I've searched a lot the internet for recipes on the subject, but it's hard anything out there. There are a couple of real life workshops that one should attend, at over $ 1000 a piece, and very few books on the subject, mostly touching the history of perfumery and the ingredients, but less the actual blends, mixes. So I broke down and purchased from Mandy Aftel the Level 1 Workbook, at a price of $ 375 (yep, you've read it right!) And shipping to Europe $ 80 (right again!), As this looks pretty much the only feasible avenue for somebody to really learn perfumery without spending a large amount of essential oils on trial and error, by not knowing what is one really doing in the process.

So now I'm waiting for it to arrive …

And in the meanime I'm musing …

Most probably since the time I started with wire wrapping, I did spend about this amount or even more on books and tutorials, however the difference between this workbook and the tutorials for wire wrapping, is that I've bought MANY tutorials, on all aspects of wire wrapping and jewelry making. I've learned a lot of skills in the process. I have now a new level of appreciation for all the wire wrappers who so freely share their knowledge in allowing the rest of us to learn their secrets, and to make their jewelry pieces. Without all these tutorials, and book out there, it would have been much more challenging to learn wire wrapping, even to the level I am right now (which is not that far). It is a completely different world between the two.

Perfumers guard their secrets as if with their lives, they will not share but the very basic of blends, which does not bring one very far, and wire wrappers, or jewelers in general are very generous, and share. Yes, for a price, but the prices are very reasonable, anything between $ 5 and $ 15 for learning how to make one pendant, a pair of earrings, a ring, any items from start up to completion. Plus there are also many free tutorials out there, which allow you to build on your existing knowledge and widen it too. Best example out there is Eni Oken, who has many tutorials for a veeeery reasonable price, but also many freebies to get you started.

All You Need To Know About FOB

FOB is an important term related to the shipping of goods. It stands for “freight on board” or “free on board” indicating the designation when the ownership or liability of goods gets transferred from the seller to the buyer. The term FOB is often confusing for many in the shipping industry. However, it is crucial that both sellers and buyers must understand the proper FOB definition and scope so that they do not end up in losing dollars. This term determines the responsibility of the party for bearing the charges of freight and also decides the point of time when the shipment is passed over from the sellers to the buyers.

For instance, in case of international shipping, FOB indicates that the consignor is going to bear the loading cost and the transportation cost for sending the goods to the port. The consignee bears expenses related to insurance, ocean freight, unloading and the transportation cost of the goods from the port to the actual destination. The seller in this situation passes over the risk of the goods to the buyer when there is the loading of goods at the port for shipment.

Difference Between Origin And Destination:

FOB origin indicates that the ownership of the goods is transferred as soon as in gets out of the hands of the seller. If shipping of the goods is required then it is the buyer’s responsibility and he or she has to bear the expenses. This type of transaction is often referred to the city name like FOB Boston, FOB San Francisco, etc.

FOB destination, on the other hand, indicates that ownership of goods is transferred to the buyer when the original products reach the doorstep of the buyer. Here, the seller has to arrange for the transportation of the goods for which either he pays or charges the buyer for the expenses. The seller also has to be liable in case the goods suffer any damage while en route.

FOB comes more into the picture when there are wholesale or B2B shipments of large goods.

Use Of FOB In The Shipping Documents:

There are four ways in which the FOB term is included in the documents for shipping:

  • FOB (place of origin)- Freight Collect
  • FOB (place of origin)- Freight Prepaid
  • FOB (place of destination)- Freight Collect
  • FOB (place of destination)- Freight Prepaid

It is important that the shippers understand the FOB designations well especially in case of damages to the goods. Some of the receiving docks totally deny the delivery of the damaged goods without accepting the damage notation. However, when a shipment is designated properly, it is clear that the damage risk has to be borne by the seller or the buyer. In such cases, there is no question of confusion. Moreover, the Incoterm 2010 has also amended the definition of FOB which has made the sale contracts simpler and understandable by all.

Why Does FOB Matter?

The term is particularly important for those companies who are engaged in shipping huge quantities of goods. A clear concept of the FOB term helps in understanding the liability of the party regarding the safety in the delivery of the shipment. It also helps the buyer and the seller in knowing which party owns the materials at a particular point of the shipping cycle. This information is also helpful for the accountants who can maintain instant records of the transactions on the basis of FOB. Moreover, the term is also useful in proper logistics management.

Sales Tax And FOB:

If you are falling in the nexus of any state which charges selling taxes on shipment, then FOB can be your friend. For the packages which have FOB origin marked on them, the buyer pays the freight charges directly by contracting with a shipper. Thus, the seller has no role here. The buyer does not have to bear sales taxes as he has already paid the freight charges which most of the states consider exempted.

When people find the term quite complex to understand and interpret, they often take the help of professionals who are expert in the field. This ensures that you comply with the terms without any faults and the shipments get managed quite fast. FOB incoterms is another interesting aspect which the shipping industry must pay attention to and know about in details.

Controlling Mold Without Toxic Chemicals

Mold can grow anywhere there are damp conditions – from a windowsill to a
bathroom, to a whole house. While the health effects of most common molds are minimal, the chemicals we commonly use to remove the unsightly growth can harm our health. Mold cleaners can contain toxic chemicals such as pentachorophenol, which can be harmful through skin absorption or inhalation, and formaldehyde, which can cause cancer as well as irritate eyes, throat, skin, and lungs. Many mold cleaners carry the "DANGER" warning label and state that they should be used only in a well-ventilated area (next time you want to clean mold from your shower, look around for the ventilation …)

Fortunately, there are ways to clean and even prevent mold that are natural and safe
for you and your family.

Mold is a living organism that needs certain conditions to stay alive. A moist, dark,
environment with little moving air is perfect. Mold just can not live in an environment
that is dry, light, or breezy. The solution to any mold problem of any kind is to
introduce heat (to dry the moisture), light, or moving air (such as from a fan).

I used to live in an old house in a forest, next to a creek, in an area that has a lot of
rainfall in the winter. One year was particularly cold and rainy and so to conserve
heat, I closed the door on my extra bedroom, which contained books and research
papers, a bed, and out-of-season clothing. By the end of winter, there was so much
mold in that room that was was literally growing on my clothing. My cotton espadrille
shoes and cloth-covered binders were covered with blue fuzz. What to do? Mold was
covering literally everything!

In my situation, I opted to use heat. I put a portable space heater in the room and
closed the door. After several hours I peeked in and steam was rising. It was like a
sauna. After twenty-four hours, however, all was bone dry and I was able to brush
visible mold (now a dry powder) from walls, clothing, and other surfaces. The moral
of the story: if you live in a damp environment that does not get much sun, make
sure your heat circulates completely around the house, and even though it may take
more energy, it's needed to keep your home dry and safe. Mold can do damage to
material possession and human health, so its better to stay warm and dry.

If you have just a small area of ​​mold, use a hand-held dryer to dry it up in just a few
minutes.

You can prevent mold from growing by keeping areas dry. Find the source of
moisture and control it. Mold in an undersink cabinet, for example, may require
fixing leaky pipes. Controlling mold in a bathroom may involve installing a small
space heater to run after a shower to dry out the room, or using a fan for the same
purpose. No moisture – no mold.

In a closet, hang garments with space between them to allow for air-flow and install
a small light, both to dispel darkness and provide a little heat. If you live in a very
humid area, a dehumidifier may be necessary.

To remove mold from shower tile or other hard surface, mix borax and water, or
vinegar and water, in a spray bottle. Spray it on and the mold wipes right off. Borax
inhibits mold growth, so wash down the walls in your bathroom with a borax
solution and just leave it on, or sprinkle borax in damp cabinets under the sink. If
you need something stronger to remove stubborn mold, use hydrogen peroxide.

Steam cleaners – which clean, sanitize, and deodorize using only hot water – also
work great on mold. You can purchase small hand-held steam cleaners in the
housewares department of discount stores for about $ 50 or larger units on the
Internet.

Read more about controlling mold without toxic chemicals in my new book Home
Safe Home, at http://www.dld123.com/homesafehome.html .