Learn to classify objects according to a certain feature (color or shape) and choose the corresponding mark.

Activity preparation:

1, teaching AIDS: 5 red round blocks and 5 square blocks; A red, a green, a square and a round mark.

2. Grouping operation materials: red, green, square and round labels, each with a sorting box.

The first group: 3 red and 3 green bottle caps (***5 copies); The second group: 3 red and 3 green (***5); The third group: 3 squares and 3 small round building blocks of the same color (***5 copies); The fourth group: 3 square cards and 3 round cards of the same color (***5 copies); Group V: 3 squares and 3 round pieces of the same color (***5 pieces).

3. Site layout: several red and green squares and circles.

Activity flow:

1, group activity: create a scene for kittens to arrange toys and stimulate children's interest in distributing toys.

Let a child put the same pieces together.

(2) Let children choose the corresponding mark and say "X mark for X film.

2. Group activities: Encourage children to help kittens divide toys carefully and mark them.

The first group: dividends, green bottle caps; The second group: dividends and green chess pieces; The third group: small building blocks with square and round colors; The fourth group: square and round cards of the same color; The fifth group: square and round pieces of the same color.

Operation requirements: ① Divide the toys, send the marks and say, "The X mark is for xx."

(3) To play well in one group, you can check with the teacher, pack up your school tools and go to another group of activities.

3. Game: Find a circle

Listen to the piano slide according to the mark and stand in the corresponding circle quickly. (Consolidate classification, improve children's ability to eliminate color and shape interference, and choose the corresponding circle according to the mark. )

4. Activity evaluation: The kitten thanked the children for helping him organize his toys and homework materials as required, and invited everyone to dance a celebration dance.

Activity reflection: In this action, I found two problems:

First, the accuracy of plane graphics (such as flowers and cards) is much higher than that of three-dimensional objects (such as chess pieces and bottle caps), regardless of color or shape.

Try to analyze the reasons: (1) In the past, when teachers provided materials, there were more plane materials, ignoring the real things that could be used in life. (2) As far as the development of children's spatial perception is concerned, plane thinking is superior to three-dimensional thinking. (3) Small class children have a low level of anti-heterosexual thinking development, and are easily disturbed by color and shape when classifying objects.

Suggestions for improvement: (1) Try to tap the educational factors in life, embody "life-oriented mathematics education" and organically infiltrate mathematics activities into daily activities. (2) Organize children to observe and touch, compare the similarities and differences between plane (picture) and three-dimensional (object), and feel the diversity of things that can be selected by the same mark.

Secondly, the requirement of this activity is to select the corresponding markers after classifying the objects, but in practice, most children insert the markers first and then select the objects.

Try to analyze the reason: from the child's point of view, it is easier to classify marks than to select them by physical classification. Because according to the classification of marks, marks first provide children with a goal and clear supporting materials, and choosing marks for physical classification requires children to think about how to divide these materials and what to divide them into, which has an internal thinking process. Especially when choosing labels for sorted materials, children are required to analyze, summarize and synthesize, which is a reverse thinking process compared with classifying according to labels.

Suggestions for improvement: (1) Carry out reverse thinking training activities suitable for small class children frequently to improve their ability of analysis, generalization and synthesis. (2) When designing various activities, pay attention to the diversity and development of problems, so as to improve the flexibility of children's thinking.