how many minutes per week or hours per year are available for non-instructional activities in this time audit: This exercise aims to highlight the importance of time as a valuable asset, underscoring the principle that time is money. Assuming the average hourly cost to school systems for professional services across the country ranges from $25-$35/hour for base salaries and an additional $10-$15/hour for benefits, we can estimate the average cost per hour for a teacher to be around $40. Alexandria is a junior high math teacher. She reports to work at 7:00 am and can leave at 3:00 pm. She teaches five 65-minute blocks daily, which is 325 minutes, totaling 1,624 weekly. She also has a 20-minute lunch break and a 65-minute planning period per day. Her students are in school 180 days per year, and the school has a professional staff of 30: 480 minutes at work each day -325 minutes of teaching - 25 minutes of WIN "What I Need" (I-Ready Time) - 65 minutes of planning time = 65 minutes available non-instructional time per day