教师资格证的英文表达有以下几种：

Teacher's Qualification Certificate

Teaching Certificate

National Teacher Certificate Examination Certificate

Certificate for teaching

Teacher Credentials

Teacher Certification

建议根据具体的语境选择合适的表达方式。例如，在正式文件或国际场合中，使用“National Teacher Certificate Examination Certificate”会更加准确和专业。在日常交流或简单介绍时，“Teacher's Qualification Certificate”或“Teaching Certificate”则更为常用。