Articles about specially designed academic instruction in English is hardly found as there is only a few articles discussing SDAIE.
SDAIE or specially designed academic instruction in English is a teaching method mainly used to teach content to students who are still learning English.
When that is the case, then SDAIE can be said similar or closely similar with CLIL (content and language integrated learning), ELD (English language development), and sheltered instruction. That statement is proven through what Genzuk (2011) argued in his paper that California has now applied the term SDAIE to replace ESL (English as second language), ELD (English language development), and sheltered instruction.
Some people try to distinguish between SDAIE with ELD. The most common argument found that ELD is aimed at enhancing students’ fluency in using English which focus on academic domain while SDAIE is explained as teaching approach that focuses on the transferring academic content while at the same time enhancing students’ English skills.
Another source explicitly states that SDAIE is not aimed at enhancing students’ general English ability but more specificly on academic English of the content area.
Based on the given explanation, it can be inferred that SDAIE is especially maintained for the enhancement of academic English on specific content areas - depends on students' major. Although it does not really clear how SDAIE differ from CLIL, ELD, and sheltered instruction, but the clues emphasize that SDAIE has its own term that might emphasize that it is different with the others.
If you are a researcher who are here to find inspiration about a new research tittle, consider taking specially designed academic instruction in English as your research variable. You may enter this domain through novelty approach on the basis that not many researchers have explored and investigated SDAIE.