The study aimed to examine the effectiveness of blended learning on Developing some higher-order thinking skills And drawing functions by using computer among Pre-service mathematics teachers, The study sample consisted of (40) students from the Level 7 Students of mathematics department at the Umluj Campus, Was preparing a list of higher – order thinking skills included the nine main skills And (25) skill subset, and the list of drawing function skills included the three main skills And (20) skill subset, and Prepared the Study Tools That Included (higher - order thinking test in mathematics, drawing functions Test), and Applied these Study Tools Previously on the Study Sample, and teacher’s guide, Then the researchers taught the drawing functions unit by using blending learning to study sample , After that application of the study tools on the study sample , and Tabulating the data and analyzing them Statistically, the study found that:

• Effectiveness of the blended learning on developing some higher - order thinking skills among Pre-service mathematics teachers.
• Effectiveness of the blended learning on developing some drawing function skills among Pre-service mathematics teachers.
• positive relationship and strong and statistically significant between higher - order thinking skills and drawing function skills of Pre-service mathematics teachers