K-6编辑历史

# K–6

**K–6** refers to the educational stage spanning kindergarten through sixth grade, typical in primary or elementary school systems in the United States and several other countries. This period covers children approximately ages 5–12 and focuses on fundamental literacy, numeracy, social skills, and an introduction to science, social studies, and the arts. K–6 serves as the foundation for later middle school and secondary education.

## 1 Definition and scope

### 1.1 Age range and grade alignment

The K–6 stage includes kindergarten (usually for children aged 5–6) followed by grades 1 through 6 (ages 6–7 to 11–12). Exact age cutoffs vary by jurisdiction, with most requiring children to turn five by a specific date (e.g., September 1 or December 31) for kindergarten entry. Students typically progress one grade per academic year, though acceleration or retention may occur based on performance or developmental readiness.

### 1.2 Typical entry and exit requirements

Entry into kindergarten generally requires proof of age, immunizations, and in some areas, a developmental screening. Exit from sixth grade is automatic upon completion of the year; however, some districts require passing scores on standardized assessments to advance to middle school. In many systems, a certificate of elementary completion is awarded, though this carries no formal academic credential beyond promotion.

## 2 Historical development

### 2.1 Origins in the common school movement

The K–6 model traces its roots to the common school movement of the mid‑19th century in the United States, led by reformers such as Horace Mann. These schools aimed to provide free, universal education for all children, typically organized as one‑ or two‑room schoolhouses covering grades 1–8. The curriculum emphasized reading, writing, arithmetic, and civic morality, setting the stage for a graded elementary structure.

### 2.2 Evolution of kindergarten inclusion

Kindergarten, original