Mayberry (2002) explains that invented signs for English (e.g. SE, SEE 1 and 2, CASE, LOVE) may seem like excellent teaching tools for teaching English "on the hands" for deaf children, however, research shows that those invented signs:
1) are not effective in teaching English to deaf children
2) are effective in teaching English to deaf children
3) are only effective for certain deaf children
4) are not widely used in teaching English to deaf children