高二英語Astronomy教案

what do we mean when we say we are studying a subject scientifically? or what’s the correct attitude towards science?
s7: we should be objective, not superstitious.
t: what’s the correct way to prove a scientific idea?
s8: we should design experiments to test it for several times.
s9: then we can analyze the results and draw a conclusion at last.
t: let’s sum up the answers. to study a subject scientifically, we must try to be objective. in order to test our idea, we should design experiments, then analyze the results and draw a conclusion. now let’s talk about the third question.
what are the most important skills we need to be real scientists?
s10: we should be very careful.
s11: be objective and logical.
s12: we should be wise enough to design an experiment and write the reports clearly.
s13: we should be able to draw conclusions from the experiments and not impose conclusions on the data.
t: i think you have done great work. from the discussion we know that it’s not easy to be a scientist. so you should work harder if you want to be a scientist.
step ⅲ pre-reading
get the ss to discuss the questions on page 25 with their partners. then ask the ss to tell their stories. encourage the ss to tell different stories. if they don’t know any, tell them some.
t: now please look at the slide show. and discuss these questions with your partners. then i’ll ask some students to tell us their stories. are you clear?
ss: yes, sir/madam.
1. do you know each religion or culture has its own ideas about the beginning of the universe? please give an example if you know.
2. do you know what a scientific idea is?
after the ss’ discussion, teacher says the following.
t: now who’d like to tell us a story? volunteer!
s1: let me try. in china, we all know that pangu separates the sky from the earth.
t: can you describe the story in details?
s1: sorry, i can’t remember clearly.
t: who can? nobody? now i’ll tell you. look at the screen.
step ⅳ reading
scanning
get the ss to read the passage quickly and accurately and meanwhile help the ss to form a good habit of reading. teacher gives the ss a couple of minutes to look through the whole passage. tell the ss to read the text silently and then ask some detailed questions about the text on the slide show with their partners. teacher should encourage the ss to express their ideas.
t: we’re going to learn a passage about how life began on the earth. now let’s look at the slide show. read the text quickly and find answers to the following questions.