With the free teacher account, you can complete 10 graded Oral Reading Fluency (ORF) assessments per calendar month. That is 10 assessments total for your whole class, not 10 assessments per student. Your assessment credits will replenish on the first of the month.
The number in parentheses next to your email indicates how many free assessments you have used that month. For example, email@example.com (2) means that you have used 2 free assessments and have 8 remaining for that month.