Duster

D-Deforestation as removal of trees

 It refers to removes the dust in free.

U-Useful for environment that clean

If not a student feel guilty and hand on chin.

S-Sorrows may removed and find happiness

Doubts may be removed and found the correctness.

T-Teacher uses it to write the new

Which clears the doubt it may few.

E-Eliminate the things found on the board

It may right or wrong, local or abroad.

R-Remove all dust from the board

It may white or black as on the road.