以沉潜为话题的作文（To dive for topic composition）

以沉潜为话题的作文（To dive for topic composition） 以沉潜为话题的作文(To dive for topic composition) Fengtai District district unit of pomegranate village primary school information technology subject teacher name Zhang Jian grade the third grade eighth class for 2006.4.18 time subject wand teaching objectives: 1, to enable students to master the knowledge of two kinds of selected graphics tool, select the graphic method and zoom. 2. Make sure students understand the differences between the two selected styles in the tool style area. Ability: train students' ability of observation and ability of independent exploration and cooperative learning. Emotion: stimulating students' interest in learning information technology. The new teaching method focuses on the selection of two graphic tools and the method of scaling selected graphics. Teaching difficulty, scaling the selected graphics. The teaching prepares the self-made teaching courseware, the student exercises the graph class hour arrangement 1 hours, the teaching process, first, creates the scene, draws out the task (plays Flash courseware "seeks the magic wand") Today, I brought an old friend to you. Who is he? (Harry Porter) Let's go and see what Potter is doing recently, Harry Courseware: my classmates, my magic wand is missing. It's killing me. I'm just going to ask the headmaster. Would you like to go with me?. ] What did Harry Porter lose?. (magic wand) In this class we'll go with Harry and Potter to find the magic wand. (blackboard: looking for magic wand) Two, independent inquiry, learning new knowledge Task 1: fix "crystal map" (select and move graphics) Teacher: let's go and ask the principal first with Harry Potter. Ha: Hello, headmaster. My magic wand is missing. Do you know what happened? S: I already know. There's a crystal map here. Your magic wand is right here. The headmaster took out a crystal map and handed it to Harry Porter, who disappeared Ha: great. Gee...... What about the headmaster? (the "snap" of the crystal map fell to the ground and broke) Oh, what can I do about it? How can I restore the map, students, you quickly help me? ] Teacher: can you help him? (energy) Please use the drawing program to open the "crystal map" on your desktop. Let's take a look at it. Student: open the crystal map picture file Teacher: how many pieces did the crystal map fall into? (4 pieces) What tools can be used to separate the four pieces and put them together? Please try to find it in the tool box. Student: try to fix the crystal map". (teacher visits, questions, names of student tools) Teacher: all right. Who found the right tools? (answer by name: selected tool) Is this one? (show pictures of the selected tools and attach them to the blackboard.) Can you show you the operation process? Pay attention while explaining and demonstrating. Student: (demonstrates the operation process and explains) (1) I will choose the selected tool in the toolbox, and then select the tools in style second styles, and then select a fragment when the mouse pointer into the shape of a cross after dragging the mouse, move it over, just select the other positions in the click click cancel. Teacher: you are very clear about what you said. Please go back Just now, when I was doing it, I found one of my classmates had such a problem. Why don't you help him see what happened? (broadcast) a student machine that causes fragments to be broken because there is no "transparent" style chosen After he selected pieces of drag over, drag over found not just pieces of paper and white background, this is why? Student: because there is no selection of second styles in the tool style area. Teacher: please choose the second styles in the tool style section for everyone to have a look. (student demonstration operation) Select the second styles in the tools style area. Just now I found that some of my classmates had such problems. There is no student machine selected when broadcasting selected fragments As he moved the pieces, he found that some of them had not moved, What's the matter? Student: because of the selected fragments, none was selected. Teacher: then, when we select the debris, be careful of the debris...? (choose the whole), after the election, and then...? (drag) Next, please resume the crystal map as soon as possible! Student: continue with your exercises Summary: whose map has been repaired? Can you show it to everyone? What's the cause of this problem? Is there anything better than him? Show the works of 1 to 2 students, student comments.) Task 2: gate of the castle ("cut in any shape" tool) Transition: Crystal map we have fixed, and now we can put the map... (for Harry and Potter) Thank you for helping me restore the map, I will immediately go to the map of the castle. (go to the next scene and walk through Schwarzwald to the castle gate) Gatekeeper: Harry, Potter, your magic wand is in it. If you want to open this door, you need to put these stones in the corresponding position on the door, will you? (the janitor disappears) Ha: the gate is too high. Class, can you put the jewels on for me? ] Teacher: can you help him put the jewels on? Student: Yes Teacher: please open the picture of "castle gate" on the table. Try to choose these precious stones separately and put them on the door. Be careful not to break stones. start Student: open the "castle gate" picture file on the table. After attempting to use the selected tool, it is found that only one gem can be selected with the selected tool. Teacher: stop. Students, do you use the tools you choose? (line or not) Is not one piece all right? (no, the first gem on the left is OK.) Why? (because this stone is a long way from other gems.) Why don't the other three pieces work? (because the three stones too close) with the selected tool selected will give other gems crumble. Are there any other tools to choose gems other than the selected tools? Student: "any shape cutting tool" Teacher: is that it? (produce pictures of any shapes of cutting tools and attach them to the blackboard) Can you show me how to use this tool? Student: demonstrates the operation process, and explains First, I choose the clipping tool in any shape, then drag the mouse around the jewel and circle it. Once selected, move the jewel to the appropriate position on the door Teacher: you are very proficient in your handling. Next, please use this method to quickly put stones on the door. Student: complete the work. Summary: whose jewels have been laid, let's have a look. (display student works. Remind students: when we use the "arbitrary shape" cutting tools, select the graphics, be careful not to choose more or less Teacher: all right. Please look at the blackboard. "Selected" and "arbitrarily shaped clipping" tools can all choose a graph. In which case can you use the "selected" tool and in what circumstances do you have to use "arbitrary shape cropping" tools? Student: you can use the selected tool when the distance between one figure or graph is far away When you need more graphics and more intensive, you need to use any shape cutting tool. Teacher: that's quite clear. If you were given a map and there was only one figure in the picture for you to choose, which tool would you use faster? Student: using selected tools is more convenient and faster. Teacher: why? (because the selected tool drags directly along the diagonal line, you can choose, and "arbitrary shape clipping" tools should be circled around the figure to be selected.) Then we should pay attention to the use of the two tools in operation, which can help you complete the task quickly. Task 3: Fry Troll (graphics zoom) Transition: the stones have been put away, Can you open the castle gate? Let's go and have a look. The door opened slowly, and Harry and Potter walked into the castle. (into the next scene, Harry, Potter comes to a hall, with his magic wand in the bottom of the hall, and a troll standing next to it) Ha: Oh! The troll get out of the way, put the magic wand back to me. Troll: hum! Forget it, unless you can make yourself bigger or shrink me. Otherwise, don't take the magic wand. ] Teacher: Harry, how can Potter defeat the troll? Student: make yourself bigger or reduce the troll. Teacher: would you please open the desktop "smart Troll" of this picture, try using these two tools today our study could help Harry Potter beat troll. start Student: open the "smart Troll" picture file. Try using the "selected" and "arbitrary shapes" clipping tools to scale the shapes. (1 - 2 minutes) (give you a hint, think of how we zoom in and out of the paper.) Teacher: who has found a way to help Harry and Potter? Did you zoom in on Harry or Potter, or did you shrink the troll? Can you give us a demonstration? Other students observe how the mouse pointer moves to what shape it can change the size of the graph. Student: demonstrates the operation step. Let me choose the Zhongshan monster first, then move the mouse pointer to the edge of the selected box. When the mouse pointer is deformed, the mouse can be magnified by dragging the mouse Potter Teacher: that's a nice way you can help Harry Potter. Who would say the big change in graphics, the shape of the mouse pointer? Student: two-way arrow. (show two-way arrow pictures, stick on the blackboard) Teacher: where does the mouse pointer move to the dashed frame, and it becomes this shape? Student: move to a darker color. Teacher: now we count on the selected box there are several such points? Student: 8 Teacher: let's call these 8 darker points the point of control. Please continue to complete the picture, but this time when you move the mouse pointer to each control point to see the mouse pointer like shape, and drag a control point to try to figure what changes will happen? Student: try and finish the work. (2 - 3 minutes) Summary: whose work has been completed and can you show it to everyone? How did you help Harry and Potter? (I made Harry Potter bigger or I Shrunk the troll.) Did you shrink the troll? Teacher: all right. Please look ahead. In the process of just operation, in addition to the double arrow diagonally you also see what direction? Student: there are vertical and horizontal, and inclined to another direction. Teacher: who would say that the mouse pointer moves to the two control points and becomes this shape?. (around two) Will the mouse pointer move to the two control points to become this shape?. (up and down two) What shape does the mouse pointer move to the four corner? (double arrow diagonally) Look at the shape of the mouse pointer. What can change the graphics? (width) What does the shape of the mouse pointer change? (height) The two angle of the mouse pointer can change the width of the graph? Can you change the height of the picture? (yes). That is to say, you can change the whole of the graphics. Consolidation exercise: the game "making vegetable clowns."" Transition: Harry Porter isn't scared of the troll anymore. Did he get the magic wand? Let's go and have a look. The troll shrinks and runs away Hum, see you still dare to humiliate people in the future. (Harry Porter gets the magic wand.) Thank you guys, I finally got my magic wand. In order to express my gratitude, I will give you a fun game, I hope you can enjoy it. Good bye, boys and girls. ] Teacher: Harry, the game Potter gave you is on your computer, in my document, it's called "making a vegetable clown"". In this game, there are three kinds of vegetables for you to choose from. What do you think they are? (carrots, onions and cabbage) there are many items in the paper around, can be used to make-up vegetables. Who can read the production requirements for everyone?. (name read, make, request) In the production process, use the "selected" and "arbitrary shapes" cutting tools to quickly select props. In the premise of ensuring the quality of the picture, you can zoom in on all the make-up props. The first choice for vegetables in the paper are the most central love making, after the completion of the production of other choice. Finally, let's take a look at who made the most creative clown vegetables. Now you can start making it. Student: start making vegetable clowns. Teacher: time is up. Whose work would you like to show us? (displaying student works) Three, summary: Boys and girls, Harry, Potter has found his magic wand. You also have a magic wand in your hand. What's that? (mouse) use it, I believe we will continue to learn more magic in the future. Blackboard design: EMBED PBrush? Width? The eighth class looks for magic wands, height EMBED PBrush EMBED PBrush EMBED PBrush feedback teaching (after notes) PAGE 1 ***[JimiSoft:, Unregistered, Software, Convert, Part, Of, File, Read, Help, To, Know, ONLY, How, To, Register.]***