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http://eratosthenes.ea.gr/
On the 21st of March,  one day after  the spring equinox students were  asked by their teachers to measure the circumference of the Earth by using simple means, reviving in this way ithe historical measurement taken by Eratosthenes about 2.250 years ago at Alexandria of Egypt. This Educational activity  addresses teachers and students of Primary and Secondary Schools.

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http://trainlikeanastronaut.org/
Mission X: Train Like an Astronaut is an international educational challenge focusing on fitness and nutrition to encourage students to "train like an astronaut".
Elementary students learn principles of healthy eating and exercise, compete for points, and get excited about space and the educational possibilities for their own future. Students practice scientific reasoning and teamwork while participating in hands-on training missions targeting strength, endurance, coordination, balance, spatial awareness, and more.

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SPACE EXPLORERS IN ACTION!
Level 1
Mission: Base Station Walk-Back
http://trainlikeanastronaut.org/content/greece/103114
We performed a walk at our own pace. We measured course and distances. We made observations.
We got our badge for completing 5 Missions from Level 1.
Now we can proceed to the Missions of Level 2

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SPACE EXPLORERS IN ACTION!
Level 1
Mission: Jump for the Moon
http://trainlikeanastronaut.org/content/greece/103114?page=1
Jumping with a rope both while stationary and moving.

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SPACE EXPLORERS IN ACTION!
Level 1
Mission: AGILITY ASTRO-COURSE
http://trainlikeanastronaut.org/content/greece/103114?page=1
Trying to improve agility coordination and speed.

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SPACE EXPLORERS IN ACTION!
Level 1
Mission: AGILITY ASTRO-COURSE
http://trainlikeanastronaut.org/content/greece/103114?page=1
Trying to improve agility coordination and speed.

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SPACE EXPLORERS IN ACTION!
Level 1
Mission: AGILITY ASTRO-COURSE
http://trainlikeanastronaut.org/content/greece/103114?page=1
Trying to improve agility coordination and speed.

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SPACE EXPLORERS IN ACTION!
Level 1
Mission: Control!
http://trainlikeanastronaut.org/content/greece/103114
Performing throwing and cathing technics on one foot to improove balance and spatial awareness from the students of the 5th and 6th grade. We had fun and at the same time realized the difficulty of the activity and how we could improve.

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SPACE EXPLORERS IN ACTION!
Level 1
Mission: Planet you go, Gravity you find
http://trainlikeanastronaut.org/content/greece/103114
We played with balls to strengthen our arms and torso muscles and improve our coordination. It seemed like an easy activity but when performing it we realized that it needed balance and coordination. This activity was performed in February and even though it was a little bit cold outside the students were determined to perform it correct and had fun with it.
In this project I collaborated with the teacher of Physical Education.

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http://eratosthenes.ea.gr/

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STEPS TO FOLLOW The experiment will take place on the 23st of September. Thus, for your matchup - if no other schools can be found on the same longitude- you can consider the existence of a virtual school on the equator with experimental data 0 (shade of a one-meter stick measured at a certain time).

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"This is so great!" they said and continued observιng, taking measurements, collaborating and discussing about time-the sun-the length of the shadow.

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After having participated in the "Eratosthenes Experiment" in September we promissed each other that we would participate in March 2017. Here we are on the 21st of March, on the spring equinox day in a football field. Waiting for the sheduled time to make our measurements and hoping for the clouds to let the sun shine
I collaborated again with the teacher of Geography. This time we also had a matching school from Romania.

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We found the time of our local noon at our location.
We took a one-meter ruler and placed it vertically to the ground and with the help of a gnomon and a measure tape, at the time scheduled to conduct the experiment, the students measured the length of the ruler's shadow. The measurement was repeated 5 times and  the values were written down.
We submited our data in the "Eratosthenes Experiment".
We learnt a lot, worked as scientists and had a lot of fun :)

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With the 5th and 6th grade we participated in September 2016 for the 1st time in the "Eratosthenes Experiment".
We tried to measure the circumference of the Earth. We used simple means following the instruction given by the "Ertosthenes Experiment".  In this way we revived in our school yard the historical measurement taken by Eratosthenes about 2.250 years ago at Alexandria of Egypt.
It was a very exciting experience!
In this project I collaborated with the teacher of Geography.