This paper discusses the Development and validation of Performance Test of science (PTS) for first grade students. The present study is conducted in Srinagar district of Kashmir. The investigator has taken 100 first grade students from Govt. schools of District Srinagar. The investigator find out reliability by test-retest reliability as 0.63, split half (U/L) as0.85, split half (O/E) 0.86 Validity of PTS has been determined by face validity.