A. Constraints
Definition : 1. Thing that limits or restricts something, or your freedom to do something
2. Strict control over the way you behave
Sentence : It seems that the unsuccessful of the project for promoting educational change in Indonesia due to the constraints such as the complexity of the educational environment.
B. Merely
Definition : only, simply
Sentence : The result of initiated Lesson Studies can be perceived as merely a starting point.
C. Arah jarum jam : Clock-wise
Definition : it is rotated to the right direction
Sentence : The point P(2,4) is rotated by 90 degrees a direction with the clock-wise.
D. Fungsi tangga : Staircase function
Definition : The function that was defined by
= the biggest smaller integer or be the same as x
Sentence : Draw the staircase function curve of and find the continuitas function 
in 
!
