Cancer

What is cancer? It is actually a group of more than one hundred separate diseases. Most of us are fear from cancer It is reasonable because next to heart disease, cancer is the second leading cause of death.

Cancer cells come from normal cells because of mutations of DNA. Those mutations can occur spontaneously. The mutations may be also induced by other factors such as: nuclear and electromagnetic radiation, viruses, bacteria and fungi, parasites, heat, chemicals in the air, water and food, mechanical cell-level injury, free radicals, evolution and ageing of DNA, etc. All such factors can produce mutations that may start cancer.

Cancer cells are formed continuously in the organism. It is estimated that there are about 10,000 cancer cells at any given time in a healthy person. Why do some result in macroscopic-level cancers and some do not? First, not all damaged cells can multiply and many of them die quickly. Second, those which potentially divide and form cancer are effectively destroyed by the mechanisms available to the immune system. Therefore cancer develops if the immune system is not working properly or the amount of cells produced is too great for the immune system to eliminate.

Source: http://understandingtext.blogspot.com/2009/06/cancer-example-of-explanation-text.html

My opinion: Cancer is a dangerous disease. It can cause death. From what I know, Cancer has no cure. So, to prevent it, we must keep our healt. Be carefull with what we eat, keep our environtment clean, keep our adequate rest, and don't smoke.

Using Mobile Phone at School

Many teachers are against students having mobile phones in schools and some others don’t really mind. Having a mobile phone at school has some advantages and some disadvantages.

Some of the advantages are that if you are sick you can call your parents without needing to go to the main office wait for some minutes and after that to call them. Another possibility is that sometimes if students don’t have games because of the bad weather there used to be a line at the main office with students waiting to call their parents to come and get them earlier. Nowadays no one goes to the main office to call his or her parents. Also in “emergencies” students can call for help faster than going to the nearest building to find a telephone and call for help.

Some disadvantages are that students send messages or even call with other students during the lesson and that distracts them from the lesson. Also some times students forget to put their phones in silence or close them and when they get a message an annoying sound in made which can disturb the whole class. Some students use their mobile phones to cheat in tests or bully with messages.

Recommendation : Bring mobile phone at school should be allowed if the students can use it at the right place and the right time.

Source: http://www.essaydepot.com/doc/20208/Advantages-And-DisAdvantages-Of-Students-Using

My opinion is that mobile phones should be allowed to be brought to school but only be used in breaks or emergencies. Also if a student is caught using his mobile phone during the lesson he should be seriously punished and an even worse punishment should be given to students caught cheating with mobile phones.

Our Brain

                Hampir sebagian besar sekolah jaman sekarang lebih mengedepankan pengembangan otak anak sebagai “organ perekam” daripada “organ berpikir”. Bukankah wajar ketika seorang siswa tidak dapat menguasai semua pelajaran yang diberikan oleh guru? Yang harus diperoleh siswa yang sudah belajar adalah kemampuan untuk berpikir secara efektif dan efisien untuk memecahkan masalah. Karena sebenarnya fungsi otak adalah organ pemikir. Dan untuk memecahkan masalah, diperlukan kemampuan berpikir tinggi.

                Untuk menjadi pemikir yang cerdas, kita harus menjadi seorang observer (pengamat), kita harus memperlakukan segala sesuatu lebih dari sekedar melihat, tetapi juga harus MEMPERHATIKAN dan MENGINGAT. Kita harus mulai bertanya pada diri kita sendiri dengan pertanyaan yang bermanfaat tentang apa yang kita lihat. Seperti, ‘mengapa bisa demikian?’, ‘apa yang menyebabkan demikian?’, dsb. Semakin banyak yang kita perhatikan atas sifat-sifat atau ciri-ciri yang dimiliki oleh suatu hal dan semakin banyak kita bisa bertanya tentang sifat-sifat tersebut, besar kemungkinan kita bisa menjadi seorang pemikir yang baik. Karena otak kita menggunakan KRITERIA atau menggunakan sifat-sifat tertentu atas file yang kita perhatikan dan pelajari untuk dimasukkan ke dalam memory kita.

                Pengajaran yang baik adalah pengajaran yang memfasilitasi dan memberi peluang pada siswanya untuk berkembangnya otak kiri maupun otak kanan secara seimbang. Para siswa tidak hanya tahu tentang “sesuatu” tetapi juga dapat bertanya tentang sesuatu dan dapat menyampaikan tentang sesuatu, serta dapat memperagakan tentang sesuatu. WE GROW UP BECAUSE WE SEE, HEAR, SPEAK, AND LEARN!

Coba Perhatikan

Suatu waktu pasti aku lelah

Suatu hari aku pasti jatuh

Dan  suatu saat aku pasti akan mengerti

Mengapa tak ada seorang pun di sini

Hingga nanti aku pahami

Kerasnya hidup yang aku jalani

Bagiku,

Perjalanan adalah proses pembangunan

Dimana ada batu, paku, dan besi

Pasir ibarat hujatan yang menghujani

Tapi lihatlah nanti

Perhatikan apa yang terjadi

Ingat-ingatlah apa yang tercipta di sini

BANGUNAN KUAT YANG SIAP MELINDUNGI