Classhook uses a letter system for rating the content level of the material. These letters represent the general grade level that the content of each clip is best suited for. For example, a clip for Kindergarten learning level would be rated with a K, or a clip for college learning level would be rated with a C.
The full list of the levels and its corresponding symbols are shown below:
![](https://help.classhook.com/wp-content/uploads/2021/02/Screen-Shot-2021-02-19-at-9.16.52-AM-1.png)
![](https://help.classhook.com/wp-content/uploads/2021/02/Screen-Shot-2021-02-19-at-9.17.07-AM.png)
![](https://help.classhook.com/wp-content/uploads/2021/02/Screen-Shot-2021-02-19-at-9.17.16-AM.png)
![](https://help.classhook.com/wp-content/uploads/2021/02/Screen-Shot-2021-02-19-at-9.17.31-AM.png)
![](https://help.classhook.com/wp-content/uploads/2021/02/Screen-Shot-2021-02-19-at-9.17.46-AM.png)
These letters are shown below every entry. Below is an example:
![](https://help.classhook.com/wp-content/uploads/2021/02/Screen-Shot-2021-02-19-at-9.21.06-AM.png)
For this clip, the E, MS and HS squares show that this clip is appropriate for Elementary, Middle, and High School Levels.