After the incident in March, the turtle was "humanely euthanised" as it was considered an invasive species.
Crosland could be jailed for up to six months and fined up to $5,000 if convicted.
The incident sparked rival petitions for and against Crosland, who has taught at Preston Junior High School for a number of years.
A counter "We Support Crosland" petition urging people "to show our support for the man that taught us science in a new way and truly loves his job" has attracted more than 3,700 signatures, many from colleagues, former students and members of the local community.
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