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Step 1: Students need to be made aware of WHY Longitudes and Latitudes were invented in the first place. They are imaginary lines which divide the earth but why were they invented in the first place.
A short story behind this Longitude and Latitude can help students learn WHY they were needed in the first place.

Step 2: Explain what is the work of Latitude and then what is the function of Longitudes in travel.

Step3: How Harrison’s Clock gave the right answer-
After decades of diligence, and many design changes, he eventually produced his marine chronometer, H4, a spring-driven clock that could measure longitude to within the half-degree required for the £20 000 prize. Despite this, Harrison was initially awarded only half the promised amount.
On a voyage from England to Jamaica in 1761–62, H4 lost just five seconds in over two months at sea. It was now possible for a navigator to determine local time by measuring high noon, and compare this to the absolute time, which had been set on an accurate chronometer at the start of the voyage. With this information, he could then determine the number of degrees of longitude that he’d traversed during his journey.
At long last, both latitude and longitude could now be determined accurately, and for the first time you could say exactly where on Earth you were.
Today we measure by GPS-Today, it’s all done electronically through GPS, a world-wide radio navigation system made up of a constellation of 24 satellites and their ground stations. These ‘artificial stars’ are used as reference points to calculate a terrestrial position to within an accuracy of a few meters. In fact, with advanced forms of GPS you can make measurements to within a centimeter!
Step4: Once the reason for creating these lines has been explained then it becomes easy for the students to relate to the concept of position

Step 5: Give them small examples of how to locate a city and how they can read Latitude and longitude to identify the place.

Step 6: To make it better for their understanding a small exercise like the one given in resources can be used.