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Grading in education is the application of standardized measurements to evaluate different levels of student achievement in a course. Grades can be expressed as letters (usually A to F), as a range (for example, 1 to 6), percentages, or as numbers out of a possible total (often out of 100).
Science education is the teaching and learning of science to school children, college students, or adults within the general public. The field of science education includes work in science content, science process (the scientific method), some social science, and some teaching pedagogy.
The Next Generation Science Standards is a multi-state effort in the United States to create new education standards that are "rich in content and practice, arranged in a coherent manner across disciplines and grades to provide all students an internationally benchmarked science education."
An A grade is for greatly exceeding the expected standard, a B grade is for exceeding the expected standard, a C is the expected standard, a D is falling behind the expected standard, and an F (or fail) is greatly behind the expected standard. Sometimes a letter grade can have a + or a - next to it, related to what percentage was given.
With the adoption of standards-based education, most states have created examinations in which students are compared to a standard of what educators, employers, parents, and other stakeholders have determined to be what every student should know and be able to do. Students are graded as exceeding, meeting, or falling below the standard.
The National Science Education Standards (NSES) [1] represent guidelines for the science education in primary and secondary schools in the United States, as established by the National Research Council in 1996. These provide a set of goals for teachers to set for their students and for administrators to provide professional development.