You can always leave, during or after the probation period, given that you fulfill some contractual requirements (like telling them some weeks in advance, see your contract). Employment is no prison. For more information, see http://en.wikipedia.org/wiki/Probation_%28workplace%29
Screening is conducted to identify or predict students who may be at risk for poor learning outcomes. Universal screening assessments are typically brief, conducted with all students at a grade level, and followed by additional testing or short-term progress monitoring to corroborate studentsâ risk status.
The screening focuses on finding problems among a large population with affordable and noninvasive methods, whereas the diagnosis focuses on pursuing additional detailed information once a particular problem has been found, and can sometimes be more invasive. Screening can also be used for prenatal sex discernment.