Table E-21. Number and percentage of states using a regular cycle to select monitoring units for monitoring, by length of cycle: 2004-05

Length of cycle		Percent of
Length of cycle	Number of states	All states [N=51]	States using a regular cycle [n=19]
Did not use a regular cycle	32	63	‡
1.5 years	1	2	5
2 years	1	2	5
3 years	10	20	53
3.5 years	1	2	5
4 years	3	6	16
5 or more years	3	6	16
‡ Not applicable. NOTE: Percentages may not sum to totals because of rounding. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Special Education Research, Evaluation of States' Monitoring and Improvement Practices Under the Individuals with Disabilities Education Act, Part C Monitoring Evaluation Questionnaire.