To write a letter of recommendation from a professor for a student, you need to^{1 2}:

• Ask the student for academic information, such as achievements, activities and GPA¹.
• Address your letter to the appropriate person or department¹.
• Introduce yourself and your qualifications as a professor¹.
• Include details about your professional relationship with the student, such as how long and in what capacity you have known them¹.
• Highlight the student's academic and personal qualities with specific examples^{1 2}.
• Maintain a positive and enthusiastic tone throughout the letter².
• Conclude your letter with a strong endorsement and contact information¹.