In the first ten years , possibly , but there ' s not a lot of useful information to be gained from that . Honest statistics would use as large a number of data points to map the distribution as possible . <| sep |> I got your back bro <| sep |> Watch the video How old is the shepherd . You ' ll see a group of typical 8 th graders conceptual skills . This is not an abnormal sample , when I taught in California my school ranked in the 50 th percentile in the state and my experiences were similar . The issue we have isn ' t that students don ' t know how to divide accurately , the issue we have is students don ' t know when to addsubtractmultiplydivide . My students use the correct operation when they map out the problem with a diagram more frequently than students who don ' t map out their thoughts . I ' ve taught around 1 , 000 students and can say that my students don ' t get confused by what a circle is , or why there are 4 of them . Instead , they are able to justify their work accurately when there is a model on their paper .