Del. Code tit. 14 § 1273
A pattern of ineffective teaching shall be defined pursuant to § 1270 of this title, provided that the local school district has complied with § 1272(a) of this title. Notwithstanding any case law to the contrary, when a pattern of ineffective teaching is established, a local school district may move to terminate a teacher (as defined by § 1401 of this title) for incompetency pursuant to § 1411 or § 1420 of this title. Nothing herein shall be construed to limit a local school district's ability to terminate a teacher for incompetency under § 1411 or § 1420 of this title where supported by factors other than a pattern of ineffective teaching, and nothing herein shall be construed to require additional factors beyond a pattern of ineffective teaching to constitute incompetency for purposes of termination.
14 Del. C. § 1273