2026-06-15T11:27:39-07:00 2025-07-31 943359608 Moss CPA 201 N Civic Drive Suite 210 Walnut Creek CA 94596 990 2024-08-01 942558375 Grand Lake Montessori Inc GRAN 5106220259 466 Chetwood Street Oakland CA 94610 Michael Sears Board Member 5106220259 2026-04-23 true true Rubian Moss P00576237 9254822626 2026-06-15 2024 2025-03-06 01:10:19Z Michael Sears 466 Chetwood St Oakland CA 94610 4152362 false X grandlakemontessori.com X 1978 CA To educate children ages 12 months to 1st grade entry using Montessori principles and other innovative teaching practices. 5 5 44 3 0 0 52597 546966 3108667 3490343 27102 115053 0 0 3188366 4152362 5500 3000 0 2203327 2487150 0 1637 1303904 1131772 3512731 3621922 -324365 530440 3048982 3519146 1175813 1115537 1873169 2403609 To educate children ages 12 months to 1st grade entry using Montessori principles and other innovative teaching practices. false false 2827536 3000 3490343 Montessori Education The Montessori curriculum allows children to progress at a more natural pace while providing a solid academic base. The teachers are trained to teach children using the Montessori materials developed by Maria Montessori in the early 1900s. There are will be a max of 135 children ages 12 months to 1st grade entry and 37 staff members. 2827536 true false false false false false false false false false true false false false false false false false true false false false false false false false false false false true false false false false false true false false false false false false false false false false false true 12 0 44 true false false false false false false false false false false X 5 5 false false false false false false false true true false false true true true true true true true true false CA X Grand Lake Montessori 5106220259 466 Chetwood Street Oakland CA 94610 Michael Sears Board Member 1.00 X 0 0 0 John Campbell Board Member 1.00 X 0 0 0 Monica MacDonald Board Member 1.00 X 0 0 0 Tanya Susoev Board Member 1.00 X 0 0 0 Alicia Cooper Head of School 40.00 X 153645 0 4383 153645 0 4383 1 false true false 526861 20105 546966 Tuition 611110 3450823 0 0 Other program revenue 611110 39520 0 0 3490343 115053 0 115053 4152362 3490343 0 115053 3000 3000 159704 0 159704 0 1815616 1580256 235360 0 44199 35359 8840 0 315639 252511 63128 0 151992 121594 30398 0 8617 0 8617 0 101400 0 101400 0 111071 90503 20568 0 1220 0 1220 0 66205 52179 12389 1637 711206 568965 142241 0 1501 1201 300 0 1872 1498 374 0 9210 7368 1842 0 31838 25470 6368 0 Educational materials 87632 87632 0 0 3621922 2827536 792749 1637 2779031 3238786 5215 5509 9963 5842 61862 63922 473424 305837 155411 167587 37500 37500 3048982 3519146 113377 122206 1062436 993331 1175813 1115537 X 1873169 2403609 1873169 2403609 3048982 3519146 530440 X false false false X 0 0 0 0 0 0 0 255259 91742 163517 218165 214095 4070 167587 true true true true true true true false false false false false false false false false false true Line 3 Notice of non-discriminatory policy ad to students posted in the San Francisco Chronicle. Notice of non-discriminatory policy ad to students posted in the San Francisco Chronicle. false false false false false false false false false Alicia Cooper 153645 0 0 0 0 0 4383 0 0 0 158028 0 0 0 John Campbell Board Member 285101 Building rentals false Pt VI, Line 11b Form 990 reviewed at Board meeting before filing. Pt VI, Line 12c Any possible conflicts of interest discussed by Board at least annually. Pt VI, Line 15a The school uses ISBOAS salary survey to review compensation for head of school. Pt VI, Line 15b The school uses ISBOA salary survey to review compensation for key employees.