A Study On The Present Situation And Strategies Of The Estimation Of Primary School Mathematics In Grade

Estimation is a teaching in primary school mathematics. And mathematics educators all agree that is an important mathematical skill. "Full-time compulsory education mathematics curriculum standard (experimental draft) " makes some pointed references:Estimation is widely used in daily life and in Mathematics Learning. Teachers should cultivate students’ awareness of the estimation and preliminary skills of estimation. Teachers should teach students can combine the specific situation to estimate and can explain the estimation process. "Compulsory education mathematics curriculum standard (2011 Edition)"also makes some pointed references:"Combined with specific situations, select the appropriate units for simple estimation, learn from the experience in life of estimation."" In the process of solving the problem, can choose the appropriate method to estimate." At present, the international mathematics education pays more attention to cultivate the ability to estimate. Pay attention to and strengthen the estimation has become a world trend.By listening to the estimation course, interviews to understand that at present, the main problems 1-3 grade primary school mathematics teaching of calculation: Teachers’ understanding to the estimation teaching has the wrong region; lack of students’ subject status in the estimation teaching; pay more attention to result than process; lack of communication between the former and later knowledge; less estimation problem solving strategies diversified finding; lack of penetration of mathematical thought. Main reason for the existence of these problems can be summarized as follows:teachers is not very clear about the target and task to estimate teaching; estimation teaching habits be fettered by the traditional teaching method; teaching strategy transformation between estimated behavior and teaching concept of lack of coordination.Combined with low grade estimation problems existing in the teaching of primary school, in order to analysis 1-3 grade mathematics teaching cases of estimation and analysis the estimation part of text in 1-3 grade mathematics of Jiangsu Edition, and related to the theoretical estimation teaching as the instruction, proposed operable teaching strategies, offer teaching ideas and perspectives for the primary school mathematics teachers in teaching cases. The teaching strategies of estimation are mainly:The teacher must have sufficient attention to the teaching of estimation. The teacher can grasp the estimate content in teaching material and comprehend all of the estimation methods. They pay attention to training students’ estimation consciousness. Let the students grasp the estimation method. Make students can chose the appropriate method of estimation flexibly, according to the exercise problems. Enable students to understand the necessity of estimation, develop a good habit of estimation and reasonable evaluation of estimation.