Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.4.0.rc.1)
// Compass (v1.0.0.alpha.20)
// ----

%teacher {
  font-family: Arial, sans-serif;
}

.teacher {
  @extend %teacher;
  color: red;
  &__grade1 {
    @extend %teacher;
    color: yellow;
  }
}

SassMeister-output.css

.teacher, .teacher__grade1 {
  font-family: Arial, sans-serif;
}

.teacher {
  color: red;
}
.teacher__grade1 {
  color: yellow;
}