Although there are two science subjects in the first semester of the second year of junior high school, mathematics and physics focus on the memory of natural phenomena and do not involve scientific thinking and reasoning.
In the second semester of the second year of junior high school, it is not difficult for the mathematical geometry part to become a quadrilateral, and the major difficulty of learning is changed from geometric proof to function. Although from the perspective of thinking difficulty, functions should be easy to prove geometrically and do not require the establishment of complex logical chains, but geometric proofs are easier to solve through model application, and the same kind of problem routine is obvious.
Due to the fact that there are fewer geometric concepts learned at this stage and the superimposed changes are limited, the routine-based training memorization mode is better than that of students who rely on independent thinking in terms of the speed and effect of problem making. The function knowledge in the next semester is to solve practical problems with scientific thinking, and it is difficult to solve problems through a unified template instead of independent thinking ability, and the function section has an obvious connection with high school learning, so the learning of mathematical functions in the next semester can better reflect the potential of students than geometry in the previous semester.
The mechanics section of the second semester of junior high school also enters the track of the second semester of science thinking competition, no longer only staying in the conceptual cognition, but solving common problems, the mechanics section is the most reflective thinking ability gap in junior high school physics, and it is also the basis of high school learning.
By the end of the second semester of the second year of junior high school, the pattern of two-level differentiation in the second year of junior high school was roughly formed. However, the competition between eugenics and eugenics, including entering the top key high school and entering the key class, needs to be differentiated in the more difficult junior high school.
Physics enters another difficult section, electricity, although the difficulty is not as good as mechanics, but it is the major difficulty of the high school entrance examination, and it is the main point of difference between eugenics, while mathematics is the two-way difficulty superposition of geometry and functions, circles are more abstract than triangle quadrilaterals, especially a large number of hidden circles require strong spatial imagination, and quadratic functions can be regarded as the front section of the higher function. Coupled with the third science chemistry, the performance of science at this time all day shows a relatively obvious gap in thinking ability.