I have a class b misdemeanor chart of theft.am I eligible to be hired as a teacher in Plano texas independent school district.

Hard "maybe." Although it is not a conviction, you plead guilty when you were placed on deferrwd adjudication. In the future you can have this offense sealed, it will remain visible to state agencies, like the TX State Board of Educators, and school districts. You should anticipate you will be required to disclose it, and may have additional scrutiny when applying for teaching positions. Although not a prohibition, a misdemeanor theft, even though you are not convicted, will create hurdles if you want to pursue a career as a teacher.