Lớp 1_3: Bài học ngày 2 tháng 3 năm 2014 của Ngô Lâm

Các em chia ra làm ba nhóm, mỗi nhóm tự viết "chương trình" để hoàn thành quy trình làm peanut butter/jelly sandwhich. Vật liệu có sẵn là: 1 lọ peanut butter, 1 lọ Jelly, và 1 bịch bánh mì sandwich .
Sau khi viết chương trình, em đại diện mỗi nhóm sẽ đọc lớn và Lâm làm theo quy trình các em đọc.

 It's interesting to see a program gets stuck at some steps (eg. there was no step saying to open the peanut butter jar from beginning, and if the jar is not opened, the following step can't be done)

The following handout was given to each student in class.

Engineering and Basic Computer Instructions.

March 2^nd, 2014

Have you ever wonder about how things round your work?  Have you ever try to do thing on your own without help or instructions from other?  Do you like math and science?  Have you ever try to make something better?  These are some of the engineering traits. So what is engineering?

·         Engineers invent ways to use scientific principles for practical good.

·         Engineers design, build, and maintain things that improve human lives.

·         They think logically, plan carefully, and calculate precisely to make all the things that we all use.

Example of engineering work:

·         Aerospace – building aircraft and spacecraft.

·         Biomedical – pharmaceuticals & medical devices.

·         Chemical – batteries, oil refineries, plastics, cleaners,

·         Computer – computer software / hardware system.

·         Civil – building Bridge / road / dams / water / sewer system.

·         Electrical – power system, microchips / radio / communication (phones, internet) / Building electronics equipment.

·         Nuclear – power plants, weapons safety.

Today, we are going to talk briefly about computer engineer, specifically regarding to how a computer (cell phone / TV) work.

Like human, every piece of electronic equipment (TV, computer / washing machine / phone…) has a “brain”.  However, their brain can NOT think.  They can only follow precise sets of instructions call PROGRAM.  Their brains are called Central Processing Unit or CPU.  It is a central place where information is processed and it tells the other parts of the computer what to do by taking inputs and directing outputs.  It is very different from human brain because it can only follow basic instructions.  However, it can perform basic instructions very fast (many billions of instructions per second).  The computer can do extremely complicate tasks because it breaks down these tasks into many simple instructions.

A program is a complete set of instructions that is given to the CPU to perform a task.  Because the CPU can NOT think, the program must be precise and complete, it must account for all possibilities that can happen during the execution of the program.  If the during the course of running the program and the CPU gets to a situation where the program did not give precise instruction, the CPU will NOT know what to do and it will crash.  The only way to recover a crash is by turn off the device and turns it back on (reboot).