Most teacher and coaches write so many recommendations they could do them in their sleep. But, if a person asked is unsure of what to put in a letter, there are some basic pieces of information that should be covered.
• The context of association (how long this person known you and in what way).
• How your performance is now.
• What standards you have met and surpassed.
• Preparedness to achieve and excel at the next level.
• It is also always good to add an altruistic element to the letter to add a personal touch.
Some schools may ask for other specific information, but these basics should always be covered.