Transcript Class Size, Capacity and Planning Factors: Additional Information Joint FAC & BAC Meeting Arlington Public Schools January 7, 2010

Class Size, Capacity and
Planning Factors:
Additional Information
Joint FAC & BAC Meeting
Arlington Public Schools
January 7, 2010
Class Size Terms
Planning Factors (PF)
Approved formulas in which staffing, materials, and supplies
are allocated to schools.
Recommended Maximum Class Size (RM)
An approved recommended number that a class size should be
within and not greater than.
Capacity Planning Factor (CPF)
A constant that is multiplied times the number of K-5
classrooms in a building to determine K-5 capacity (currently:
22.33 students)
Increase Class Size by One Based on Planning Factors
Increase recommended max by one at each grade level; may or
may not change number of students in an individual class
depending on grade, school, school year
FY 2010 Elementary Planning Factors
A
B
FORMULA
# of students divided by planning
factor
# of students divided by
recommended maximum class size
Grade 1
# of students divided by 19
# of students divided by 23
Grade 2
# of students divided by 21
# of students divided by 25
Grade 3
# of students divided by 21
# of students divided by 25
Grade 4
# of students divided by 23
# of students divided by 27
Grade 5
# of students divided by 23
# of students divided by 27
Elementary Class Sizes 2009-2010 –
Grades 1-5 – By School
K
aver min max
Abingdon
19.5
19
20
Arlington Science Focus
23
22
24
Arlington Traditional23
School
23
23
Ashlawn
20.8
20
21
Barcroft
16
12
19
Barrett
23.3
23
24
Carlin Springs
19.4
18
20
Claremont
21.3
20
22
Drew
18.5
18
19
Glebe
22.5
20
24
Hoffman-Boston 15.7
15
16
Jamestown
21.3
20
22
Key
17.8
15
22
Long Branch
22.3
21
23
McKinley
21.3
21
22
Nottingham
19
18
20
Oakridge
20.4
19
21
Patrick Henry
18.8
17
20
Randolph
18
16
19
Taylor
21.8
21
22
Tuckahoe
19.6
18
20
K
18.9 21.1
Average Class Size
20.1
per Grade
Grade 1
aver min max
22
22
22
19.5
19
20
23
23
23
19.3
19
20
19
18
20
18
18
18
17.8
17
19
23
23
23
15.5
15
16
24
23
25
13
12
14
18.6
12
23
18.6
17
21
19
18
20
24
24
24
21.4
21
22
20.8
20
21
21
20
23
13
12
14
21.3
21
22
20.8
20
22
1 18.8 20.6
19.4
Grade2
aver min max
17.8
17
19
17.8
17
19
22.7
22
23
18
17
19
18
17
19
17.4
17
18
22.3
22
23
23.7
23
25
17.5
17
18
19.7
19
21
20
20
20
19.5
12
23
21.2
21
22
21.7
20
23
22.7
22
23
19.8
19
20
21.3
21
22
19.3
19
20
20.3
18
22
22.6
21
24
21.5
20
23
2 19.1 21.2
20.1
Grade 3
aver min max
21
21
21
20.6
20
21
23
23
23
19.3
19
20
17.5
17
18
21
20
22
20.8
20
22
16.7
15
18
14
14
14
21.3
21
22
17.5
17
18
18.3
18
19
19.8
16
22
22.5
22
24
25.3
25
26
20
19
21
25
25
25
18
18
18
16.7
16
17
23.8
23
24
21.8
21
23
3 19.5 20.9
20.1
Grade 4
aver min max
28
28
28
21.7
21
22
23.7
23
24
20.5
20
21
17.7
17
18
21.7
21
23
22.3
21
24
18.3
18
19
16.5
16
17
16.3
15
18
17
16
18
22
21
23
26
24
27
21.5
21
23
20.3
19
21
25.7
25
26
20.8
19
22
15
15
15
16.7
15
19
22.5
21
24
23.7
23
25
4
20 21.8
20.9
Grade 5
aver min max
23
23
23
25.7
24
27
24
24
24
24
24
24
18
17
19
26
26
26
21.3
21
22
18.3
18
19
18
18
18
21.3
20
22
21.5
21
22
19.2
19
20
23.7
23
24
20.7
20
22
21.7
19
23
23.7
23
24
25
25
25
16.7
16
18
17.3
17
18
23
22
24
22
22
22
5
21 22.2
21.2
Current Planning Factors compared
to State Maximums
APS 3rd Grade
APS 2nd Grade
APS
APS 1st GradeK
19
20
21
22
23
24
25
26
27
28
29
State maximum – 1-3
State maximum - K
APS 4th Grade
State maximum – 4-5
APS 5th Grade
30
31
32
33
34
35
Illustrative Example:
Impact of Increasing Class Size by One (Planning
Factor & Recommended Maximum)
CURRENT
Kindergarten
Teacher
Teachers
1-5
CASE 1
3.00
CASE 2
CASE 3
INCREASE BY ONE
DIFFERENCE
Kindergarten
Teacher
Teachers
1-5
Kindergarten
Teacher
Teachers
1-5
12.00
3.00
11.00
-
(1.00)
5.00
20.00
4.00
18.00
(1.00)
(2.00)
3.00
12.00
3.00
12.00
-
-
Illustrative Example: Impact of Class Size
Increase by One on 2009-2010 Staffing
Reduction of
20 elem classes
Impact of Class Size +1 on
Current Year Classrooms
Impact of Class Size +1 on
Current Year Classrooms
Illustrative Example: Impact of Class Size
Increase by Two on 2009-2010 Staffing
Reduction of
33 elem classes
Illustrative Example: Impact of Class Size
Increase by One on 2010-2011 Staffing
Reduction of
19 elem classes
Capacity Numbers: MGT & APS
Differences in capacity numbers due to four
reasons:
1. Variation in formula (same number of rooms)
2. Current use vs. potential use
3. Clarity of detail due to 30,000 foot view from
MGT
4. Adjustments to room uses not yet captured by
APS (last capacity update Aug 09)
Staff Planning Factors and
Capacity Planning Factor
APS 3rd Grade
APS 2nd Grade
APS
APS 1st GradeK
20
21
22
23
Capacity Planning Factor
22.33 per K-5 Classroom
19
24
25
26
27
28
29
State maximum – 1-3
State maximum - K
APS 4th Grade
State maximum – 4-5
APS 5th Grade
30
31
32
33
34
35
Capacity Numbers: MGT & APS
Variation in formula – Elementary Schools
MGT Model
APS Model
Type of
Classroom
Number
of Classes
Capacity/
Planning
Factor
Total
Kindergarten
5
22
110
First Grade
4
19
76
Second Grade
5
21
105
Third Grade
3
21
63
Fourth Grade
4
23
92
Fifth Grade
3
23
PreK
Special Ed
2
VPI
Type of
Classroom
Number of
Classes
Capacity/
Planning
Factor
Total
Graded
(K-5)
24
22.33
536
PreK
Special Ed
2
8
16
VPI
1
16
16
69
Montessori
1
22
22
8
16
TOTAL
28
1
16
16
Montessori
1
22
22
TOTAL
28
590
569
Same school shows difference of 21 students. APS model has advantage for
long-term planning.
Enrollment Projections: MGT & APS
Projection
Year
APS
MGT
difference
2010
20933
21751
-818
2011
21657
22285
-628
2012
22358
22740
-382
2013
23074
22973
101
2014
22838
23321
-483
2015
24615
23434
1181
Enrollment Projections: MGT & APS
•
Differences in projection numbers due to
variation in methodologies
•
•
•
APS selects a single methodology
MGT uses a combination methodology
APS staff and MGT are confident in APS’
methodology
•
•
Historically accurate within 2% systemwide
Updated twice yearly
Web Page
Information and materials related to
process:
http://www.apsva.us/elemcapacity
In addition, the web page has an e-mail
option for comments and suggestions.