PUBLIC EDUCATION. 2469

may order such investigations as he may deem necessary. If he approves
the recommendation, the teacher's certificate shall be revoked and the
teacher shall be dropped from the service.

This section applies to a principal as well as to other teachers. The law does not

contemplate any such officer as a principal with duties other than those of a teacher.

The duties imposed by this section, can be performed only by those actually engaged

in teaching. School Commissioners v. Adams, 43 Md. 354.

An. Code, sec. 57. 1904, sec. 55. 1888, sec. 51. 1872, ch. 377. 1916, ch. 506, sec. 57.

87. The state superintendent of schools shall keep a full and complete
record of the academic preparation, the professional training and teaching
experience of each applicant to whom a certificate is issued. He shall keep
a complete record of the credentials, certificates or diplomas upon which
certificates may have been issued or renewed, and shall keep on file for at
least six months all written examination papers. He shall keep a complete
record and file of all certificates issued and of all certificates in force. He
shall make known to county superintendents the names of teachers holding
certificates who are unemployed, but seeking positions, and no provisional
certificate may be issued by a county superintendent when it is possible to
employ persons holding regularly issued certificates; nor shall persons be
employed holding third grade certificates, when it is possible to employ
persons holding second grade certificates, nor shall persons be employed
holding second grade certificates when it is possible to employ persons
holding first grade certificates.

An. Code, sec. 58. 1904, sec. 56. 1888, sec. 52. 1872, ch. 377. 1904, ch. 584.
1916, ch. 506, sec. 58.

88. Teachers' certificates shall be of two classes: first class and second
class. All teachers' certificates issued by the state superintendent of schools
shall, when issued, be of the second class, and shall be subject to classification
by the county superintendent. The certificates of all the teachers employed
shall be classified by the county superintendent, not less than once in two
years. In determining the class of the certificate of a particular teacher,
the following points are to be considered: (a) Scholarship; (b) executive
ability; (c) personality, and (d) teaching power. The county superin-
tendent may add such other requirements as are approved by the super-
intendent of public education. The county superintendent shall keep a
record of the kind, grade and class of certificate held by each teacher
employed in the county, and on or before the first day of October each
year, he shall submit to the county board of education a list of all the
teachers employed, together with the kind, grade and class of their certifi-
cates, and a copy of this report shall be transmitted to the state superinten-
dent of schools.

An. Code, sec. 59. 1904, sec. 57. 1888, sec. 53. 1872, ch. 377. 1904 ch. 584 1912 ch 138

1916, ch. 506, sec. 59.

89. The salaries of teachers shall hereafter be paid monthly, during the
school year on or before the tenth day of the calendar month succeeding
that for which the salary is due. No teacher shall be entitled to receive
payment for services unless all the current records of the school have been